Consider the value of all four quantum number for last electron and spin multiplicity (2s+1) for givenn two element 'X' and 'Y' in their ground state:
`{:(,n,,l,m,s,|2s+1|),(X:,2,0,0,+1//2,1),(Y:,2,1,-1,-1//2,4):}`
The according to given information the correct statement is:

Options

A. The bond angle `(H-Y-H)` of possible hydride of element Y is less than `190"28'`
B. The possible halide of 'X' has two vacant p-orbitals on its central atom.
C. Magnetic moment of Y is greater than X
D. X and Y element exhibits only single oxidation are

Answer

A, B, C

Explanation

According to given information `X implies Be and Y implies N`
(a0 possible hydride of N is `NH_(3)(H-N-H` bond angle is less than `109"28.`)
(b) In `BeX_(2)`, Be has two vacent p-orbirtals
(c) Magneti cmoment of N>Be. (number of unpaired `e^(-)` in N>Be)
(d) N can exhibits variable oxidation state.