atoms and water properties

Question 1

what does the atomic number represent?

Answer 1

the atomic number represents the number of protons there are

Question 2

valence

Answer 2

the term used to describe the electrons in the outermost energy level

Question 3

formula to find the number of neutrons

Answer 3

atomic mass - protons = number of neutrons

Question 4

what are carbon-based molecules called?

Answer 4

organic molecules

Question 5

chemical bonds

Answer 5

attractions between unstable atoms

Question 6

covalent bond

Answer 6

attraction where atoms share electrons

Question 7

polar molecule

Answer 7

uneven charge

Question 8

hydrogen bonds

Answer 8

a bond between two molecules

Question 9

polarity

Answer 9

uneven charge

Question 10

what happens to water when it freezes

Answer 10

it expands and becomes less dense when it freezes

Question 11

cohesive

Answer 11

an attraction between molecules of the same substance
- pulls water molecules together
- responsible for surface tension

Question 12

high heat capacity

Answer 12

the amount of heat energy needed to increase substance temp.
- hydrogen bonds in water make it hard for molecules to move faster and increase temp.

Question 13

adhesive

Answer 13

attraction between molecules of different substance
- capillary action is responsible for water rising up a narrow tube

Question 13

universal solvent

Answer 13

water dissolves more substance than any other liquids
- solutions are made out of one or more solutes in a solution
- non polar, no mix

Question 14

solute

Answer 14

what is dissolving

Question 15

solvent

Answer 15

what does the dissolving