Question

The elements of the third period of the periodic table are given below:
Group I II III IV V VI VII
Na Mg Al Si P S Cl
(a) Which atom is bigger – Na or Mg? Why?
(b) Identify the most
(i) Metallic and
(ii) Non-metallic element in period 3.

Answer 1

Answer:

The third period contains eight elements: sodium, magnesium, aluminium, silicon, phosphorus, sulfur, chlorine, and argon. The first two, sodium and magnesium, are members of the s-block of the periodic table, while the others are members of the p-block.

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Answer 2

Answer:

Explanation:

Sodium(Na) is bigger than Magnesium(Mg) because the atomic no. of Na is 11 whereas the atomic number of Magnesium is 12 so the atom of Magnesium shrinks more than sodium