Whichstatement (s) are correct ? (1) A 3s sub - shell hasa maximum of8 electrons. (2)An elementwith configurationof 1s^(2) 2s^(2)3p^(6)3s^(2) would be in the same group as beryllium. (3) The general electronic configuration of the groupcontaining N_(2) is ns^(2) np^(2). (4) A strontium atom has a filled outer shell if it loses tow electrons.

Whichstatement (s) are correct ? (1) A 3s sub - shell hasa maximum of

1.	Whichstatement (s) are correct ? (1) A 3s sub - shell hasa maximum of8 electrons. (2)An elementwith configurationof 1s^(2) 2s^(2)3p^(6)3s^(2) would be in the same group as beryllium. (3) The general electronic configuration of the groupcontaining N_(2) is ns^(2) np^(2). (4) A strontium atom has a filled outer shell if it loses tow electrons.
Answer» 1,2 and 3 1 and 3 2 and 4 Only 4 Solution :(1) Incorrect 3- s -sub - level can have a maximum of 2 electrons. (2) Correct : It is the electron configurationof MG . (3) Incorrect : Thecorrect VALENCESHELL configuration of this group is `NS^(2)np^(3)` . (4) Correct: It is in secondgroupwith onlytwovalenceelectrons.