chemistry

Question 1

chemical reactions

Answer 1

interaction of molecules/ atoms resulting in their change; leads to formation of breaking chemical bonds

Question 2

chemical bonds

Answer 2

energy holding two atoms 2gether

Question 3

reactant

Answer 3

w/e is being added or subtracted

Question 4

product

Answer 4

on the other side of the ->

Question 5

3 types of chemical bonds

Answer 5

1. ionic bond- transfer electrons
2. covalent bond- shares outer electrons
3. hydrogen bond - force between polar molecules

Question 6

hydroPHILIC

Answer 6

polar molecules that form hydrogen bonds & are attracted to water; soluble

Question 7

hydroPHOBIC

Answer 7

non polar molecule; not soluble

Question 8

significance of hydrogen bonds

Answer 8

hold water molecules 2gether

Question 9

atomic number

Answer 9

of protons

Question 10

atomic mass

Answer 10

protons + neutrons

Question 11

protons

Answer 11

= number of electrons; positive charge

Question 12

electrons

Answer 12

negative charge

Question 13

atom vs. ion

Answer 13

ion- atom w/ unequal charge

atom- neutral charge

Question 14

PH

Answer 14

indicates acidity of a substance; measures hydrogen (H+)

basic- over 8
acid- under 8
neutral - 7

Question 15

lost and gain electrons

Answer 15

if electron is lost than positive charge

if electron is gained its negative charge