Atoms of elements in group 1 have one electron in their
outermost energy
level
eight electrons in
their outermost
energy level
seven electrons in
their outermost
energy level
two electrons in
their outermost
energy level

1.solid

2.carbon dioxide

3.helium

i think it's c. if you look search electronic symbol on google and then click on wiki it shows you a

catya that's not even a b or c

colorless gas, exhibiting a blue glow when placed in an electric field

b) solid

its a type of rock