Question

Which of the following element does not belong to third period? *

1.Sodium
2.Aluminium
3.Chlorine
4.Carbon​

Answer 1

Answer:

Carbon is not there in ‘third period’ of the ‘modern periodic table’.

Option: C

Explanation:

The elements in the ‘second period’ of the ‘periodic table’ are: lithium, beryllium, boron, carbon, nitrogen, oxygen, fluorine, and neon.  

Hence carbon is belongs to the second period of the ‘modern periodic table’.  

The third period of the modern ‘periodic table’ consists of sodium, magnesium, aluminium, silicone, phosphorus, ‘sulphur’, chlorine, and argon.  

Hence the odd one from the above list of the compound is carbon. All the others belong to the third period in the ‘modern periodic table’.

Hope it helps

Answer 2

Answer:

chlorine is the answer

Explanation:

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