chem test 1

Question 1

what is the relationship between an atoms atomic number and its mass number

Answer 1

mass number will always be greater than or equal to the atomic number

Question 2

atomic notation

Answer 2

mass-too left
AN- bottom left

Question 3

isotopes

Answer 3

atoms of the same element with different numbers of neutrons

Question 4

most abundant hydrogen

Answer 4

hydrogen 1-protium

Question 5

average atomic mass

Answer 5

( mass x ( percent/ 100)) + ( mass x ( percent/ 100))

Question 6

why is atomic mass of an element not always a whole number

Answer 6

the atomic mass is the weighted average of all naturally occurring isotopes of an element

Question 7

amu is equal to

Answer 7

one twelfth the mass of a carbon 12

Question 8

subshells

Answer 8

s,p,d,f

Question 9

how much electrons does each subshell have

Answer 9

s- 2
p-6
d-10
f-14

Question 10

polyatomic ion naming

Answer 10

per, ate, ite, hypo

example: perchlorate, chlorate, chlorite, hypochlorite

Question 11

covalent compounds

Answer 11

between two non-metals and uses prefixes

Question 12

ionic compounds

Answer 12

between a metal and a non-metal no prefixes

Question 13

law of conservation of mass

Answer 13

matter cannot be created or destroyed in a chemical reaction. number of atoms of each element must be the same on both sides of the equation

Question 14

rules for balancing equations

Answer 14

• balance metals first
• balance nonmetals in order of CHO