Question

element "A" belongs to 3rd period and group 1 of the modern periodic table
write the formula of compound formed by "A" with the most reactive non metal of the period?
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Answer 1

Explanation:

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Answer 2

Answer:

An element belongs to the 3rd period and Group II of the periodic table.

Name of the element is ________.

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ANSWER

As it is in period 3 valence shell is 3 that is n=3 and since it's present in group 2, it has 2 valence electrons in the third shell. Hence its valence shell configuration is 3s

2

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Hence in the first orbital, it will have 2 whereas in second orbital it will have 8 electrons, on the whole, it has 12 electrons that is the atomic number is 12. Hence the name of the element is magnesium.

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