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Question

The electronic configuration of two elements A and B are 2,8,3 and 2,8,7 respectively. Find the atomic number of these elements. State the nature and formula of the compound formed by the union of these elements.

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Solution

First element:

Electronic configuration = 2, 8, 3

Atomic number = 13

Symbol of element = Al

Second element:

Electronic configuration = 2, 8, 7

Atomic number = 17

Symbol of element = Cl

By the union of these elements: Aluminum chloride (AlCl3) is formed, which is an ionic compound.


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