Answer
See explanation
Work Step by Step
Formula reminder
Protons = Z
Neutrons = A − Z
Electrons (neutral atom) = Z
a. Z = 10, A = 20
Element: Atomic number 10 → Neon
Symbol: Ne
Protons: 10
Neutrons: 20 − 10 = 10
Electrons: 10
b. Z = 13, A = 27
Element: Atomic number 13 → Aluminum
Symbol: Al
Protons: 13
Neutrons: 27 − 13 = 14
Electrons: 13
c. Z = 38, A = 88
Element: Atomic number 38 → Strontium
Symbol: Sr
Protons: 38
Neutrons: 88 − 38 = 50
Electrons: 38
d. Z = 55, A = 133
Element: Atomic number 55 → Cesium
Symbol: Cs
Protons: 55
Neutrons: 133 − 55 = 78
Electrons: 55
e. Z = 28, A = 59
Element: Atomic number 28 → Nickel
Symbol: Ni
Protons: 28
Neutrons: 59 − 28 = 31
Electrons: 28
f. Z = 79, A = 197
Element: Atomic number 79 → Gold
Symbol: Au
Protons: 79
Neutrons: 197 − 79 = 118
Electrons: 79
