Question

(b) $^{32}s$ protons neutrons electrons (c) manganese - 55 ($^{55}mn$) protons neutrons electrons

Explanation:

Step1: Determine atomic number of sulfur

The atomic number of sulfur (S) is 16. In a neutral atom, the number of protons = number of electrons = atomic number. The mass - number is 32.

Step2: Calculate number of neutrons

Number of neutrons = mass - number - atomic number. For $^{32}S$, number of neutrons = 32 - 16=16.

Step3: Determine atomic number of manganese

The atomic number of manganese (Mn) is 25. In a neutral atom, the number of protons = number of electrons = atomic number. The mass - number is 55.

Step4: Calculate number of neutrons for manganese

Number of neutrons = mass - number - atomic number. For $^{55}Mn$, number of neutrons = 55 - 25 = 30.

Answer:

For $^{32}S$:
Protons: 16
Neutrons: 16
Electrons: 16
For $^{55}Mn$:
Protons: 25
Neutrons: 30
Electrons: 25