Question

What is the valency of following elements:


Fe, C, Zn, Cr, Mg, Mn, Na, K​

Answer 1

Answer:

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• iron exhibits 2 valence states of +2 and +3.
• The valency of carbon is 4
• Zn Atomic no =30 Has electric configuration of 2,8,18,2 so it need to lose 2β or2e- as per octate rule it has valence if 2+.
• So the valency of Cr is 1 but Cr shows oxidation states of +6,+5,+4,+3,+2,+1,-1,-2 and -4.
• Magnesium's valency is 2.
• Mn  ⟹ 7 electrons.
• A sodium atom has 1 valence electron.
• Potassium (K) typically has 19 total electrons, 1 of which is in the outermost shell, and therefore 1 valence electron.

Answer 2

Answer:

1. iron exhibits 2 valence states of +2 and +3.
2. The valency of carbon is 4
3. Zn Atomic no =30 Has electric configuration of 2,8,18,2 so it need to lose 2β or2e- as per octate rule it has valence if 2+.
4. So the valency of Cr is 1 but Cr shows oxidation states of +6,+5,+4,+3,+2,+1,-1,-2 and -4.
5. Magnesium's valency is 2.
6. Mn ⟹ 7 electrons.
7. A sodium atom has 1 valence electron.
8. Potassium (K) typically has 19 total electrons, 1 of which is in the outermost shell, and therefore 1 valence electron.