What are periods
Asked by Agamagam296 | 9th Jun, 2019, 01:04: PM
Periods are horizontal rows in the periodic table which depicts elements. The Modern Periodic Table has 7 horizontal rows known as periods.
Answered by Sivanand Patnaik | 9th Jun, 2019, 03:31: PM
- Match the atomic number 4,14,8,15,19 with the each of the following : (a) A solid non metal of valency 3 (b) A gas of the valence 2 (c) A metal of the valence 1 (d) A non metal of the valence 4
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