Question

Q8:- Which element has (a) two shells, both of which are completely filled with electrons ?
(b) The electronic configuration 2, 8, 2?
ਕਿਸ ਤੱਤ ਵਿੱਚ (ਉ) ਦੋ ਸੈੱਲ ਹੁੰਦੇ ਹਨ ਅਤੇ ਦੱਵੇਂ ਇਲੈੱਕਟਾਨਾਂ ਨਾਲ ਪੂਰੇ ਭਰੇ ਹੁੰਦੇ ਹਨ?
(ਅ) ਇਲੈੱਕਟਾਨੀ ਤਰਤੀਬ 2, 8,2 ਹੈ?​

Answer 1

Sodium is the element which has two shells both of which are completely filled with electrons

Answer 2

Answer:

(a)Neon

(b)Magnesium

Explanation:

(a) Both the shells are completely fill so the configuration will be 2,8

which makes the atomic number 10. Thus, the required answer is Neon.

(b)The configuration is 2,8,2 so the atomic number will be 12.

Thus, the required answer is Magnesium .