First 30 elements with their atomic mass

Hydrogen - H - 1 - 1

Helium - He - 2 - 4

Lithium - Li - 3 - 7

Berelium - Be - 4 - 9

Boron - B - 5 - 11

Carbon - C - 6 - 12

Nitrogen - N - 7 - 14

Oxygen - O - 8 - 16

Fluorine - F - 9 - 19

Neon - Ne - 10 - 21

Sodium - Na - 11 - 23

Magnesium - Mg - 12 - 24

Aluminium - Al - 13 - 27

Silicon - Si - 14 - 28

Phosphorous - P - 15 - 31

Sulfur - S - 16 - 32

Chlorine - Cl - 17 - 35.5

Argon - Ag - 18 - 36

Potassium - K - 19 - 39

Calcium - Ca - 20 - 40

Scandium - Sc - 21 - 45

Vanadium - Vn - 22 - 48

Titanium - Ti - 23 - 51

Vanadium - Vn - 24 - 52

Manganese - Mn - 25 - 55

Iron - Fe - 26 - 56

Cobalt - Co - 27 - 59

Nickle - Ni - 28 - 59

Copper - Cu - 29 - 64

Zinc - Zn - 30 - 65

The correct answer is C.Do the atoms that make up the substance have nuclei that split apart over time?