Chapter 2- Molecules Of Life

Question 0

A liquid that can dissolve other substances

Answer 0

Solvent

Question 1

A substance that cannot be broken down into a different substance

Answer 1

Element

Question 2

Positively charged subatomic particles found in the nucleus of all atoms

Answer 2

Proton

Question 3

Uncharged subatomic particle found in the atomic nucleus

Answer 3

Neutron

Question 4

Holds up to two electrons

Lowest energy

Answer 4

First shell

Question 5

Tendency of water molecules to stick together

Answer 5

Cohesion

Question 6

Negatively charged subatomic particle that occupies orbitals around atomic nucleus

Answer 6

Electron

Question 7

Four elements that make up most cells

Answer 7

Oxygen
Carbon
Nitrogen
Hydrogen

Question 8

Shares a pair of electrons

Answer 8

Covalent bond

Question 9

Atoms that are electrically charged from losing or gaining electrons

Answer 9

Ions

Question 10

Form weak attractions between neighboring water molecules

Answer 10

Hydrogen Bonds

Question 11

The number of protons in an atom

Answer 11

Atomic number

Question 12

Substances that contain two or more elements in a fixed ratio

Answer 12

Compound

Question 13

Positive electrical charge

Answer 13

Proton

Question 14

Forms of an element that differ in mass

Answer 14

Isotope

Question 15

The attraction between oppositely charged ions

Answer 15

Ionic bond