If you fill this out 20 points, but I need all the answers

Li   3   7   3   4   3

P   15   31   15   16   15

Cl   17   35   17   18   17

Ni   28   59   28   31   28

Ne   10   39   10   29   10

Ag   47   108   47   61   47

H   1   1   1   0   1

Si   14   28   14   14   14  

W   74   184   74   110   74

Ne   10   20   10   10    10

Explanation:

Atomic number and the number of protons are the SAME

number of protons are electrons are the SAME

mass #- protons = Neutrons

Neutrons- mass #= protons

I HAVEN'T DONE THIS IN A WHILE SO I HOPE EVERYTHING IS CORRECT

specific gravity is the density of a substance divided by the density of water. since (at standard temperature and pressure) water has a density of 1 gram/cm3, and since all of the units cancel, specific gravity is usually very close to the same value as density

so "c" is the answer

plz give brainliest

a