Question

The atom of an elements X has 7 electrons in it's M shell

a. Write the election configuration of elements X.

b. What is the atomic number of elements X?

c. Name the element X. Is it metal or non-metal?

Answer 1

Answer:

1s2,2s2,2p6,3s1(. a)

atomic number is 11

X element is metal

Answer 2

Configuration:2;8;7

Atomic number is 17

Element is chlorine.

It is non metal because it lies in right of modern periodic table.

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