Question

1. What are the common features of the electronic configurations of elements at the end of periods 2 and 3 ?

2. How does atomic size changes from left to right in a period ? ​

Answer 1

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1. What are the common features of the electronic configurations of elements at the end of periods 2 and 3 ?

Ans:-The element at the end of period 2 and Period 3 have 8 electrons in its outermost shell.

2. How does atomic size changes from left to right in a period ?

Ans:- Periodic Trend.

The atomic radius of atoms generally decreases from left to right across a period. Since the force of attraction between nuclei and electrons increases, the size of the atoms decreases.

Answer 2

Answer:

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