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A covalent bond is formed between an anion and a cation.

A) True
B) False

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The important solvent associated with living things is


A) carbon dioxide.
B) sodium chloride.
C) ethyl alcohol.
D) benzene.
E) water.

F) B) and D)
G) A) and B)

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The atomic number equals the number of __________ an atom possesses.


A) neutrons
B) protons
C) protons plus electrons
D) neutrons plus protons
E) electrons plus protons

F) A) and C)
G) A) and B)

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What is the maximum number of electrons in the second energy shell of an atom?


A) 2
B) 4
C) 8
D) 18
E) 32

F) A) and B)
G) A) and C)

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Protons and neutrons make up the atom's central core referred to as its _____.

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Polar molecules are composed of covalently bonded


A) identical atoms.
B) carbon atoms.
C) ions.
D) atoms of different electronegativity.
E) atoms of identical electronegativity.

F) A) and E)
G) B) and C)

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Organic chemicals always have a basic framework of the element _____ bonded to other atoms.

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The total number of protons and neutrons of an element establishes its _____ number.

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Anything that occupies space and has mass is called


A) an electron.
B) living.
C) matter.
D) energy.
E) space.

F) C) and D)
G) A) and C)

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_____ bonds are formed by dehydration synthesis between adjacent amino acids.

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Only charged atoms can form ionic bonds.

A) True
B) False

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Cations are


A) charged subatomic particles.
B) atoms that have gained electrons.
C) radioactive isotopes.
D) capable of forming ionic bonds with anions.
E) atoms without protons.

F) D) and E)
G) A) and D)

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All of the following are correct about triglycerides, except


A) they are insoluble in water.
B) they are a concentrated source of energy.
C) when they are unsaturated they are solid.
D) they dissolve in nonpolar solvents.
E) they are digested by lipases.

F) All of the above
G) A) and B)

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Identify and provide specific examples of the classes of macromolecules that are associated with life.

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The classes of macromolecules associated...

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