Question

Determine A,Z,P,E,N:

(foto)

Answer 1

c) ⁴² ₂₀ Ca ⁺²

A = 42

Z = 20

P = 20

E = 20 - 2

E = 18

N = A - P

N = 42 - 20

N = 22

d) ¹⁹ ₉ F ⁻

A = 19

Z = 9

P = 9

E = 9 + 1

E = 10

N = A - P

N = 19 - 9

N = 10