Really need help on this it's due in 10 minutes please

the atomic mass is the bottom number on the element.

-steel jelly

1.solid

2.carbon dioxide

3.helium

i think the answer is terrae but not 100 percent sure. ▓▬▬ §

each chemical family is represented as a group or column on the periodic table. based on chemical properties, there are 6 types of chemical families. group 1 represents alkali metals, group 2 represents alkaline earth metals, groups 3 to 12 represent transition metals, groups 13 to 16 represent non-metals and other metals, group 17 represents halogens and group 18 represents noble gases.