Question

which element has 16 neutrons, 15 protons, and 15 electrons?
a gallium
b zinc
c phosphorus
d sulfur

Explanation:

Step1: Identify the element based on proton number

The number of protons in an atom is equal to its atomic number. Here, the number of protons is 15.

Step2: Recall the atomic number of given elements

• Gallium has an atomic number of 31.
• Zinc has an atomic number of 30.
• Phosphorus has an atomic number of 15.
• Sulfur has an atomic number of 16.

Answer:

C. Phosphorus