HELP! me please help with this science assignment

I’m not sure about the rest but 4 is families

ANSWER:
4. Group
5. Period
6. The purpose of the zigzag line is to help recognize which elements are metals, nonmetals, and which ones are metalloids.
7. For 7, you would just draw a copy of what thorium looks like on the periodic table. You can look it up and it will come up.
9. The nickel atomic nucleus contains 28 protons while the copper atomic nucleus contains 29 protons.
10. The chlorine atom contains 17 protons while sulfur has 16 protons. The chlorine atom has only one more proton than sulfur does, meaning no element can appear between sulfur chlorine because there cannot be half a proton.
HOPE THIS HELPS :)

B. a graduated substance