Answer:
Here's what I get.
Explanation:
The isotopic symbol for an atom is
[tex]\rm _{Z}^{M}A[/tex]
The atomic number (Z) is the number of protons (p) in the nucleus.
In a neutral atom, the number of electrons (e) equals the number of protons. n = e
The mass number (A) is the number of protons plus the number of neutrons (n).
A = p + n or
n = A - p
(a) [tex]\rm _{5}^{10}B[/tex]
p = 5
e = 5
n = 10 - 5 = 5
(b) [tex]\rm _{18}^{36}Ar[/tex]
p = 18
e = 18
n = 36 - 18 = 18
(c) [tex]\rm _{38}^{85}Sr[/tex]
p = 38
e = 38
n = 85 - 38 = 47
(d)[tex]\rm _{6}^{11}C[/tex]
p = 5
e = 6
n = 11 - 6 = 5
