Select incorrect statement

see full answer

Your Exam Success, Personally Taken Care Of

1:1 expert mentors customize learning to your strength and weaknesses – so you score higher in school , IIT JEE and NEET entrance exams.

An Intiative by Sri Chaitanya

Among Li⊖ and Be⊖,Be⊖ is most unlikely to exist.

The period number and group number of any representative element(s) are same, then elements in their ground state has the possible value of n = 2,1 = 0

Amongst Mn, Be, Rb and Tl, Rb is most electropositive (metallic) in nature

If there are three possible value −12,0,+12 for the spin magnetic quantum number m2 , then there will be 15 elements in the second period of the periodic table.

answer is D.

(Unlock A.I Detailed Solution for FREE)

Best Courses for You

JEE

NEET

Foundation JEE

Foundation NEET

CBSE

Detailed Solution

1) e−+Be2s2⟶B⊖2s22p1 (It is difficult to add e−in the higher 2p orbital). Thus unlikely to exist. e−+Li2s′⟶Li2s2⊖e−can be added to same energy level 2sorbital) 2) 3) ) Rb (Alkali metal) is most electropositiveCorrect (4) 12 elements.For, n = 2.⇒ 12 Elements

Watch 3-min video & get full concept clarity