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Modern Periodic Table

The electroni...

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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