Question

How does the electronic configuration in atoms change

1. in a period from left to right ?
2. in a group top to bottom ?


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Answer 1

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As we move from left to right across a period, the number of electrons increases.

As we move from top to bottom in a group it decreases

Answer 2

Answer:

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Explanation:

Atomic Size in a Period Decreases from Left to Right. As we move from left to right across a period, thenumber of electrons in the outer energy level increases but it is the same outer energy level. the electron configuration for the elements in Period 2