Question

40
Ca
20


A=
P=
N=
Ē=
Z=


ex: 27
Al 3+
13

A=27
P=13
N=14(A-P)
Ē=10(13-3+)
Z=13(=P)

Answer 1

40 Ca 20

A= 40
p= 20 prótons
e= p = 20 elétrons
z= p = 20

A= p+n
n= A-p
n= 40-20
n= 20 nêutrons