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Glossary of Ch 2 The Chemical Level of Organization

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Atoms consist of what 3 elements?
Protons, Neutrons, electrons
To be chemically stable, the atoms of all elements except hydrogen and helium must hold __________ electrons in the valence shell.
8
The number of protons located in an atoms nucleus is known as its?
Atomic number
The factors that influence the chance that a collision will occur and cause a chemical reaction are ___________ and _____________?
concentration and temperature
T/F

The four elements which compose most of the body's mass are carbon, hydrogen, oxygen, and nitrogen
True
T/F

Ionic bonds occur when atoms lose, gain, and share electrons in their valence shell.
False
T/F

Covalent bonds can form only between atoms of different elements
False
T/F

The atoms form a molecule by sharing one, two, or three pairs of their valence electrons.
True
T/F

The greater the number of electron pairs shared, the stronger the covalent bond.
True
T/F

Covalent bonds are the least common chemical bonds in the body.
False
T/F

Covalent bonds can be either polar or nonpolar
True
T/F
Organic componds that function primarily to provide a readily available source of chemical energy to generate the ATP that drives metabolic reactions are Carbohydrates.
True
The body's most highly concentrated form of chemical energy is?
Triglycerides
The organic compounds that serve in structural, regulatory, contractile, immunoligical, transport, and catalyti8c capacities are?
Proteins

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