How will you find the valency of chlorine, sulphur and magnesium
Answer:
Explanation:
ANSWER
If the number of electrons in the outermost shell of an atom of an element is less than or equal to 4, then the valency of an element is equal to the number of electrons in the outermost shell.
If it is greater than 4 then, the valance is determined by subtracting the outermost shell of electrons from 8.
The electrons in Cl, S, and Mg are 2,8,7 ; 2,8,6 ; 2,8,2
Hence the valency of Cl, S, and Mg are 1, 2, 2 respectively.
Answer:
Chlorine has 7 valence electrons
Magnesium has 2 valence electrons
Sulphur has 6 Valence electrons
Explanation:
We can find how many valence electrons by looking at the periodic table. For instance chlorine is a halogen and therefore has 7 valence electrons as it is in group 17. Magnesium is in group 2 so therefore has 2 valence electrons.
Sulphur is in group 16 and therefore has 6 valence electrons.
If the group has double digits I.e 16 like sulphur we only look at the second digit i.e. 6 as we can't have more than 8 valence electrons.
what is a positive effect on an ecosystem?
Answer:
Ways in which people positively affect ecosystems around the world include Recycling. Establishing wildlife preserves and parks. Creating green, open space laws.
Explanation:
During cellular respiration every living thing in this food web uses gas and releases back into the environment
Answer:
B) oxygen:carbon dioxide, because of the process of Cellular respiration, the process by which organisms combine oxygen with foodstuff molecules, diverting the chemical energy in these substances into life-sustaining processes and discarding, as waste products, carbon dioxide and water.
Explanation:
What are the importance of familiarizing the functions of carpentry tools and equipment
plss paki sagot
Answer:
Each tool is precisely designed for a specific purpose, so choosing the correct tool will also decrease the amount of effort required to get a job done right without causing damage to either the equipment or the surface
summary of the electron transport chain
In order to support life a planet will need ...
Answer:
sun light and water and fresh air
Answer:
The standard definition for a habitable planet is one that can sustain life for a significant period of time. As far as researchers know, this requires a planet to have liquid water. To detect this water from space, it must be on the planet's surface.
Explanation:
:)
What is an adaptation another species have developed to resist the toxic sting of a nematocyst?
Answer:
The mouth covered by chitin and intracellular granules of chitin (i.e. spindles) in nudibranchs
Explanation:
Nudibranchs are marine gastropod molluscs (Opisthobranchia, Mollusca). These organisms are carnivorous, so they feed on sponges, coral, anemones, hydroids, fish eggs, etc. On the other hand, cnidarians have specialized cells called cnidoblasts or cnidocytes that contain nematocysts made up of toxins that serve as a defense mechanism. Nematocysts are found in many species of Cnidarians such as, for example, in the tentacles of sea anemones. Interestingly, nudibranchs have developed some adaptations for feeding on these species. In the first place, nudibranchs have the mouth covered by a substance named chitin that allows them to chomp and swallow anemone tentacles. Second, they (nudibranchs) also have intracellular granules of chitin (i.e. spindles) in the digestive system that function as biological sandbags which maintain nematocyst toxins away from sensitive body parts.
The mucus coat of clownfish protects the fish from sea anemone's sting which is an adaptation clownfish developed.
What is Nematocysts?Nematocysts are cells found in which is use for locomotion and for defence and capturing prey.
Nematocysts contain coiled threadswhich is like hairlike projections called which are sensitive to touch and can penetrate the body ofprey.that may bear barbs. Nematocysts is found in Sea anemone, Hydra and so on and it is use to capture prey.The clown fish have mucus coat which prevents nematocysts from penetrating through it and hence ensures it's defence from been attacked or captured as prey by Sea anemone.Therefore, The mucus coat of clownfish protects the fish from sea anemone's sting which is an adaptation clownfish developed
For more details on nematocysts check the link below.
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When did humans first evolve?
20 million years ago
200 million years ago
0.2 million years ago
2 billion years ago
Answer:
0.2 million years ago
Explanation:
Correct Answer
I'm writing this because, I would like school to be more fun! First, It would most likely motivate kids to do school, And what I mean by more fun is adding funny pictures, fun fact's, Etc.
How about when Class Connect start's, we could Do this, By example: " The bird on the coordinate jumped on 3, and flew to 7! ". This could make kids use a method to help them do things, More than just coordinate's.
We can decorate K12 by the holiday's! Like, Snowflake's for Christmas, and other's. And maybe a button ( You can only use once) To make it rain around the screen! Like snowflake's, Flower's, Etc.
In conclusion, To make K12 more fun, We could add a little Daily streak that go's up every time you attend Class Connect! This could make Children attend more for their Daily Streak.
This is why K12 should do this.
Sincerely,
Victoria Golubev
(Pts: Kid's would most likely like school more if this will be done!)
what are the defense mechanisms of the human body
Explanation:
The human body has three primary lines of defense to fight against foreign invaders, including viruses, bacteria, and fungi. The immune system's three lines of defense include physical and chemical barriers, non-specific innate responses, and specific adaptive responses.
The human body possesses several defense mechanisms to protect itself against pathogens (disease-causing microorganisms) and other harmful substances such as innate and adaptive immune system.
Innate immunity is the body's first line of defense and is present from birth. It provides immediate protection against a wide range of pathogens. Adaptive immunity is a specific defense mechanism that develops over time in response to specific pathogens. It provides long-lasting immunity and has the ability to recognize and remember specific pathogens. Both innate and adaptive immunity work together to provide a comprehensive defense against pathogens. Innate immunity provides rapid, general protection, while adaptive immunity offers specific, targeted responses. The coordination between these defense mechanisms helps the body combat infections and maintain overall health.
Learn more about the human defense mechanism here.
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Thanks to the people who answered my last question! Thank you so much! ^^
Explain the scientific meaning and use of the word "transformation".
Answer:
The act, state or process of changing, such as in form or structure; the conversion from one form to another.
Explanation:
what is the Biogenesis Theory?
Answer:
Biogenesis is the production of new living organisms. Conceptually, biogenesis sometimes attributed to Louis Pasteur and encompasses the belief that complex living things come only from other living things, by means of reproduction.
:)
How do different types of forces affect objects?
ITS 58 POINTS!
Answer:
Forces affect how objects move. They may cause motion; they may also slow, stop, or change the direction of motion of an object that is already moving. Since force cause changes in the speed or direction of an object, we can say that forces cause changes in velocity. Remember that acceleration is a change in velocity.
Explanation:
what is the random distribution of chromosomes during meiosis called
genetic variation
recombination
crossing over
independent assortment
Answer:
It is : independent assortment
Explanation:
Explains:
When cells divide during meiosis, homologous chromosomes are randomly distributed during anaphase I, separating and segregating independently of each other. This is called independent assortment. It results in gametes that have unique combinations of chromosomes.
Help ASAP! tell me if am right ty
Answer:
you are right
Explanation:
List the four different types of solutions.
Answer:
solid
liquid
gas
.......
Answer:
Explanation:
Gas - (Also known as "Foam")
Liquid - (Also known as "Emulsion")
Liquid - (Also known as "Gel")
Solid - (Also known as "Solid Sol")
Describe one important piece of machinery in plant cells, and how that machinery helps keep plant cells alive. Pleas help. This is a school assignment.
(This is 7th grade science).
Answer:
Cytoplasm
Explanation:
The Cytoplasm is a Jelly-like substance, where chemical reactions take place.
Why are chromosomes important to mitosis?
Answer:
The daughter cells need a copy of every chromosome in order to replicate and separate.
Explanation:
Cells have to replicate their genetic material to make a whole other cell. Before mitosis the cells need this step for mitosis.
Answer:
The fundamental importance of chromosomes is that they contain DNA, or deoxyribonucleic acid, the substance that contains every organism's genetic code. When a cell divides, its chromosomes must first replicate. Cells divide in two basic ways – mitosis and meiosis. The latter type of division incorporates the former.
Explanation:
what is Skeletal major organs and structures?
Answer:
The skeletal system is your body's central framework. It consists of bones and connective tissue, including cartilage, tendons, and ligaments. It's also called the musculoskeletal system.
Explanation:
WHICH BODY SYSTEM IS A LOOP?
A.) Circulatory
B.) Nervous
C.) Respiratory
Answer:
A. circulatory
Explanation:
Help ASAP PLZ! CORRECT ME IF AM WRONG TY BOYS AND GIRLS
In what organelle the chloroplast process occur in
Answer:
It occurs in the green tissue.
Explanation:
they are concentrated particularly in the parenchyma cells of the leaf mesophyll.
Answer:
Photosynthetic cells contain special pigments that absorb light energy. Different pigments respond to different wavelengths of visible light. Chlorophyll, the primary pigment used in photosynthesis, reflects green light and absorbs red and blue light most strongly.In plants, photosynthesis takes place in chloroplasts, which contain the chlorophyll. Chloroplasts are surrounded by a double membrane and contain a third inner membrane, called the thylakoid membrane, that forms long folds within the organelle. In electron micrographs, thylakoid membranes look like stacks of coins, although the compartments they form are connected like a maze of chambers. The green pigment chlorophyll is located within the thylakoid membrane, and the space between the thylakoid and the chloroplast membranes is called the stroma (Figure 3, Figure 4).
Chlorophyll A is the major pigment used in photosynthesis, but there are several types of chlorophyll and numerous other pigments that respond to light, including red, brown, and blue pigments. These other pigments may help channel light energy to chlorophyll A or protect the cell from photo-damage. For example, the photosynthetic protists called dinoflagellates, which are responsible for the "red tides" that often prompt warnings against eating shellfish, contain a variety of light-sensitive pigments, including both chlorophyll and the red pigments responsible for their dramatic coloration.
Photomicrographs of chloroplasts with structures labeled are shown alongside a simplified illustration of a photosynthetic cell with a prominent chloroplast. A portion of the chloroplast illustration is depicted enlarged next to the cell to show the structure of a granum, which consists of stacked thylakoids.
Figure 4: Diagram of a chloroplast inside a cell, showing thylakoid stacks
Shown here is a chloroplast inside a cell, with the outer membrane (OE) and inner membrane (IE) labeled. Other features of the cell include the nucleus (N), mitochondrion (M), and plasma membrane (PM). At right and below are microscopic images of thylakoid stacks called grana. Note the relationship between the granal and stromal membranes.
© 2004 Nature Publishing Group Soll, J. & Schleiff, E. Protein import into chloroplasts. Nature Reviews Molecular Cell Biology 5, 198-208 (2004) doi:10.1038/nrm1333. All rights reserved. View Terms of Use
Figure Detail
What Are the Steps of Photosynthesis?
Photosynthesis consists of both light-dependent reactions and light-independent reactions. In plants, the so-called "light" reactions occur within the chloroplast thylakoids, where the aforementioned chlorophyll pigments reside. When light energy reaches the pigment molecules, it energizes the electrons within them, and these electrons are shunted to an electron transport chain in the thylakoid membrane. Every step in the electron transport chain then brings each electron to a lower energy state and harnesses its energy by producing ATP and NADPH. Meanwhile, each chlorophyll molecule replaces its lost electron with an electron from water; this process essentially splits water molecules to produce oxygen (Figure 5).
An illustration shows the light and dark reactions for photosynthesis drawn on top of a simplified image of a chloroplast, represented as an oviform capsule. Inside the capsule are five stacks of three or four flat, green thylakoid discs. The discs look like stacked quarters. Two thylakoid stacks have been cut away so that their interiors, which are hollow, are visible.
Figure 5: The light and dark reactions in the chloroplast
Photosynthetic cells contain chlorophyll and other light-sensitive pigments that capture solar energy. In the presence of carbon dioxide, such cells are able to convert this solar energy into energy-rich organic molecules, such as glucose. These cells not only drive the global carbon cycle, but they also produce much of the oxygen present in atmosphere of the Earth. Essentially, nonphotosynthetic cells use the products of photosynthesis to do the opposite of photosynthesis: break down glucose and release carbon dioxide.
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please answer these
1. Which aspects of soil do you think are easiest to change? Which are more difficult
change? Why?
The most difficult property of a soil to modify is fertility, while the easiest property to modify is texture.
What is the ground?Soil is the surface part of the earth's crust, biologically active, which comes from the disintegration or physical or chemical alteration of the rocks and the residues of the activities of living beings that settle on it.
What are the main properties of the soil?Some of the soil properties are:
Texture. Soils vary among themselves according to the elements that constitute them and their texture changes according to the quantity and size of the particles that form it.Fertility. Soils vary among themselves according to their level of fertility, that is, according to their ability to support plant life.PH. Soils vary from each other according to their level of acidity (pH). The pH is measured on a scale that goes from 1 to 14, with 7 being a neutral pH, less than 7: acidic and greater than 7: basic.Mutation. Soils change over time and due to factors such as the decomposition of organic waste, excessive rainfall, among others.Permeability. Soils vary among themselves according to their permeability, that is, the ability to filter water and air.Structure. Soils vary among themselves according to the way in which the elements and materials that constitute them are grouped.Salinity. Soils vary among themselves according to the percentage of accumulated soluble salts they have.Porosity. The soils vary among themselves according to the number and structure of the pores, which are those soil spaces that are empty, that is, they are not formed by solid matter, but by water and air.What is the easiest and most difficult soil property to modify?The easiest property to modify of the floor is the texture because if we want a more rigid or softer floor we can replace it with any material that is available for that purpose. However, this does not guarantee other properties such as fertility, salinity, good pH, among others.
On the other hand, the most difficult soil property to modify is fertility, since this property is the result of very specific physical and chemical processes. For example, we cannot modify the fertility of the soil of a desert.
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Explain how oceanic crust is continuously created at mid-ocean ridges.
In digestion, where are molecules coming from? *
a.From food the animal eats
b.From the blood
c.From the cells
Answer:
In digestion molecules come from food the animal eats (option a).
Explanation:
Foods that are consumed are those that provide the necessary molecules for the maintenance of the organism. The process of digestion consists of converting food into molecules —amino acids, glucose and fatty acids— that are easily absorbed by the body.
When an animal eats food, its digestive system is in charge of processing it and converting it into simple molecules, necessary to cover its requirements.
Hello need help ASAP! plz answer if you know the answers
Look at the digestive system, tell me if i did some thing wrong. Thank you guys
Answer:
yes this should be correct
Explanation:
Which principle states that sedimentary rocks are deposited as large
sheets of sediment?
Lateral Continuity
original horizontality
Correlation
HELPPP PLEASE AWO
During anaerobic respiration in humans, glucose is converted into what two products?
Answer:
Anaerobic cell respiration (glycolysis + fermentation) produces 2 ATP/glucose consumed. Aerobic cell respiration (glycolysis + the Krebs cycle + respiratory electron transport) produces 36 ATP/glucose consumed.
Explanation:
Anaerobic respiration (without oxygen)
During glycolysis, glucose molecules (six-carbon molecules) are split into two pyruvates (three-carbon molecules) during a sequence of enzyme-controlled reactions. This is the same reaction as occurs in aerobic respiration.
Answer:
Explanation:
Glycolysis breaks down glucose (6-C) into two molecules of pyruvate (3C), and also produces: Hydrogen carriers (NADH) from an oxidised precursor (NAD+) A small yield of ATP (net gain of 2 molecules)
The nitrogen bases down the center are held together by?
Which two statements describe evidence that directly led to the development of the theory of plate tectonics?
A.Sonar confirmed the presence of mid-ocean ridges.
B.Each continent has its own unique mountain formations.
C.Fossils of plants found in South America differ from fossils found in Africa.
D.Seismic data showed that most earthquakes and volcanoes occur where crust is being formed or destroyed.
Answer: The answer is A and D
Explanation:
Jus pick it if you trust me
Two statements that describe evidence that directly led to the development of the theory of plate tectonics? a) Sonar confirmed the presence of mid-ocean ridges. d) Seismic data showed that most earthquakes and volcanoes occur where crust is being formed or destroyed.
What is plate tectonic theory?According to this theory, the earth's surface is separated by plates that move above the molten mantle. Over the plate borders, these plates interact with one another, causing friction.
What is seismic data?Seismic surveys provide a scan of the earth's subsurface using reflected sound waves.
By knowing the speeds at which seismic waves move through rocks at various places and depths, we can learn about geologic formations on the earth. and describes the way an area will tremble during an earthquake.
Hence, options (a) and (d) are correct.
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