Chemistry
State the number of elements in Period 1, Period 2, and Period 3 of the periodic table. Name them.
Periodic Table
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Answer
No. of elements in:
Period 1 = 2
Hydrogen (H) , Helium (He).
Period 2 = 8
Lithium (Li), Beryllium (Be), Boron (B), Carbon (C), Nitrogen (N), Oxygen (O), Fluorine (F), Neon(Ne).
Period 3 = 8
Sodium (Na), Magnesium (Mg), Aluminium (Al), Silicon (Si), Phosphorus (P), Sulphur (S), Chlorine (Cl), Argon (Ar).
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