Ch 2 The Chemical Level Of Organization

Front 1

Atoms consist of what 3 elements?

Back 1

Protons, Neutrons, electrons

Front 2

To be chemically stable, the atoms of all elements except hydrogen and helium must hold __________ electrons in the valence shell.

Back 2

8

Front 3

The number of protons located in an atoms nucleus is known as its?

Back 3

Atomic number

Front 4

The factors that influence the chance that a collision will occur and cause a chemical reaction are ___________ and _____________?

Back 4

concentration and temperature

Front 5

T/F

The four elements which compose most of the body's mass are carbon, hydrogen, oxygen, and nitrogen

Back 5

True

Front 6

T/F

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

Back 6

False

Front 7

T/F

Covalent bonds can form only between atoms of different elements

Back 7

False

Front 8

T/F

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

Back 8

True

Front 9

T/F

The greater the number of electron pairs shared, the stronger the covalent bond.

Back 9

True

Front 10

T/F

Covalent bonds are the least common chemical bonds in the body.

Back 10

False

Front 11

T/F

Covalent bonds can be either polar or nonpolar

Back 11

True

Front 12

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.

Back 12

True

Front 13

The body's most highly concentrated form of chemical energy is?

Back 13

Triglycerides

Front 14

The organic compounds that serve in structural, regulatory, contractile, immunoligical, transport, and catalyti8c capacities are?

Back 14

Proteins