The first 20 elements on the periodic table and number of their neutrons?

The first 20 elements on the periodic table and number of their neutrons?

1 thought on “The first 20 elements on the periodic table and number of their neutrons?”

  1. Atomic Number Element Symbol

    1 Hydrogen H

    2 Helium He

    3 Lithium Li

    4 Beryllium Be

    5 Boron B

    6 Carbon C

    7 Nitrogen N

    8 Oxygen O

    9 Fluorine F

    10 Neon Ne

    11 Sodium Na

    12 Magnesium Mg

    13 Aluminium Al

    14 Silicon Si

    15 Phosphorus P

    16 Sulfur S

    17 Chlorine Cl

    18 Argon Ar

    19 Potassium K

    20 Calcium Ca

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