Premium Online Home Tutors
3 Tutor System
Starting just at 265/hour
Answer :
(a) Lithium : (2, 1)
Sodium :(2, 8, 1)
Potassium : (2, 8, 8, 1)
(b) Beryllium :(2, 2)
Calcium : (2, 8, 8, 2)
(c) Helium :(2); Neon :(2, 8)
Argon : (2, 8, 8)