3. Complete the table below.
Symbol Atomic
Number
Na
Cl
Ar
Ca
11
20
Mass
Number
36
40
Number of
Protons
17
Number of Number of
Electrons
Neutrons
18
12
18

3 Complete the table below Symbol Atomic Number Na Cl Ar Ca 11 20 Mass Number 36 40 Number of Protons 17 Number of Number of Electrons Neutrons 18 12 18 class=