Question

3.Which of the following is a non-metal?
1) Iron
2) calcium
3)Nitrogen
4)Aluminium​

Answer 1

Answer:

Nitrogen (N), nonmetallic element of Group 15 [Va] of the periodic table. It is a colourless, odourless, tasteless gas that is the most plentiful element in Earth's atmosphere and is a constituent of all living matter.

Usual oxidation states: −3, +3, +5

Electron configuration: 1s22s22p3

Melting point: −209.86 °C (−345.8 °F)

Atomic number: 7

Explanation:

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