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3 years ago

Which substances form covalent bonds?

Biology

2 answers:

Semenov [28]3 years ago

6 0

Answer:

The answer to your question is: Nonmetals

Explanation:

Covalent bonds is a chemical link between two atoms where they share electrons.

This kind of bond happens between two nonmetals or when the subtraction of the electronegativity of the elements in this bond is between 0.5 and 1.7.

faltersainse [42]3 years ago

3 0

Answer:they usually occur between nonmetals. For example, in water each hydrogen and oxygen share a pair of electrons to make a molecule of two hydrogen atoms single bonded to a single oxygen atom. In general ionic bonds occur between elements that are far apart on the periodic table.

Explanation:

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Wallace-Well's discussion of "The Great Filter" demonstrates:

forsale [732]

Answer:

C. None of the above

Explanation:

The Great Filter is the concept propounded based on the fact that, there is no evidence of intelligent lives in our solar system aside ours who are already inhabiting the earth. This theory implies that, there is 9 steps involved from the starting a Star to its colonization of the universe with the steps known as evolutionary paths.

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3 years ago

Proteins are three dimensional molecules made of strands of amino acids (imagine a ball of string). There are 20 different amino

zlopas [31]

Answer:

A series of nonpolar amino acids would most likely be located in the interior region of the tridimensional molecule.

Explanation:

Proteins are formed by linearly arranged amino acids, each with a side chain: the R-group.

Of the 20 different amino acids that compose the proteins, about half of them -10- are non-polar. Their R-groups are not stable if they are in contact with water, meaning that non-polar amino acids are hydrophobic.

When proteins are synthesized, they acquire a three-dimensional structure that makes them more stable. Lineal polypeptides get folded and turn into a shape that makes them more stable in the environment and capable of accomplishing their biological role. When they are in an aqueous media, their bent shape leaves the hydrophilic R-groups in contact with water. The hydrophilic R-groups stick in the center of the polypeptide, facing the protein interior, and avoiding interaction with water.

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3 years ago

Which of the following is NOT true of bacteria?

enyata [817]

If you go on mc3.edu/admissions/applying-to-mccc/testing-and-assessment/assets/biology-placement-test.pdf page 11 it will tell you all the answers to your questions....

Download pdf

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3 years ago

Which of the following is true concerning continental crust? a. It does not contain radioactive elements. b. It mostly contains

Phantasy [73]

The mantle is more dense, so it can not B.
Not even A , because the crust sure does contain naturally occurring radioactive material. Heat is also not efficiently transferred to the surface--most ground is cool,
so correct option is none is above that is D
hope it helps

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3 years ago

Read 2 more answers

What phase of mitosis is pictured below?

Dmitrij [34]

Answer:

Its a Anaphase

because the chromatids of each chromosomes have separated and are moving towards the poles

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3 years ago