Question

5. The electronic configuration of an element is 2, 8, 4. State its :

(a) group and period in the Modern Periodic Table.

(b) name and write its one physical property........?

Answer 1

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Since the electronic configuration of given element is 2, 8, 4, it’s atomic number is 14 with having 4 valence electrons. Therefore,

(a) It belongs to third period and fourth group of the Modern Periodic Table.

(b) Name of this element is silicon (Si).

Physical properties of silicon: (Any one)

It is solid at room temperature.

It is a non-metal.

It has a very high melting point.

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Answer 2

Since the electronic configuration of given element is 2, 8, 4, it’s atomic number is 14 with having 4 valence electrons. Therefore,

(a) It belongs to third period and fourth group of the Modern Periodic Table.

(b) Name of this element is silicon (Si).

Physical properties of silicon: (Any one)

It is solid at room temperature.

It is a non-metal.

It has a very high melting point.