Question

10)The third shell of an element X contains 7 electrons. Its mass no is 35. a) Write the electronic configuration of this element? b) What is the atomic no of this element? c) Write the no of neutrons in this element.​

Answer 1

Answer:

The given element is Chlorine (Cl)

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Explanation:

Mass no. =35

Electrons in third shell =7

Therefore, electronic configuration=2, 8, 7

Atomic no. =17

No. of neutrons= Mass no. - Atomic no.

= 35 - 17

= 18 neutrons