Carole owns a two story house with a heating and cooling unit on each floor. in the winter she mostly uses the downstairs unit because the volume of warm air and warming the whole house through
a) expands, rises, convection
b) expands, sinks, conduction
c) contracts, rises, conversion
d) contracts, sinks, contraption

sorry i was late, but i don't know what assignment your talking about, i'm in flvs as well, im in earth space science. but u are behind pace bc every class should be in the 3's or 4'

answer: i dont know the answer but this might

explanation:

l

atomic mass = 39

number of neutrons = 20

number of protons= 19

electronic configuration = 1s2 2s2 2p6 3s2 3p6 4s1

the number of electron in first shell = 2

number of electrons in n=3 shell = 8