Question

please give answer fast of Q6

Answer 1

Answer:

Option 1 is correct ✔️✔️

valance electron = number of electrons in outermost shell.

here, valance e- = ( 5 + 3)= 8 ✔️

so, number of elements = total number of moles × Avogadro number

= 4.2/14 × Na = 0.3Na

now, total number of valance electrons = Number of elements × number if e- in its valance shell

= 0.3 × 8 = 2.4Na