Question

25 points

SCIENCE

CLASS IX

CORRECT SOLUTION=BRAINLIEST

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Answer 1

2,8,2

12

12

2

and this element is MAGNESIUM

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Answer 2

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ANSWER (^_-)
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An atom of an element has two electrons in the outermost M shell.

a) The Electronic Configuration will be 2,8,2 i. e. 2 electrons in K shell, 8 electrons in L shell and 2 electrons in M shell.

b) The atomic number of the element will be 12. (2+8+2).

c) No. Of Protons = Atomic number of the element.
So, No. Of Protons = 12.

d) Valency of an element = No. Of electrons on the outermost shell.
So, valency = 2.
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