Silicon must have 4 single covalent bond, every single bond has 2 electrons (one pair), so 4·2=8 electrons (octet).
I’d say market and distribution would be the next step
The density is one gram per mL, so 1.
Metals on the left side, metalloids on the staircase, nonmetals on right side
The one that is observed or measured in the experiment, and it is known as the dependent variable.
