Question

Which of the following elements is not there in third period of the modern
modern periodic
table ?
A. Sodium B. Magnesium C. Carbon D. Sulphur​

Answer 1

Which of the following elements is not there in third period of the modern

modern periodic table ?

=> B. Magnesium

Answer 2

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’.

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