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Question
State the number of elements in periods 1, Periods 2, and Period 3 of the periodic table. Name them.
Answer in Brief
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Solution
Period 1 has two elements: Hydrogen (H) and Helium (He).
Period 2 has 8 elements: Lithium (Li), Beryllium (Be), Boron (B), Carbon (C), Nitrogen (N), Oxygen (O), Fluorine (F), and Neon (Ne).
Period 3 has 8 elements: Sodium (Na), Magnesium (Mg), Aluminium (Al), Silicon (Si), Phosphorus (P), Sulphur (S), Chlorine (Cl), and Argon (Ar).
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Chapter 1: Periodic Table, Periodic Properties and Variations of Properties - lntext Questions [Page 11]
