Question

question 15
an element with the atomic number 12 would contain:
a 24 protons
b 6 protons and 6 electrons
c 12 protons
d 6 protons and 6 neutrons

Explanation:

Step1: Recall the definition of atomic number

The atomic number of an element is equal to the number of protons in its nucleus.

Step2: Analyze each option

• Option A: If atomic number is 12, number of protons is 12, not 24.
• Option B: 6 protons would mean atomic number 6 (carbon), not 12.
• Option C: Since atomic number = number of protons, for atomic number 12, there are 12 protons.
• Option D: 6 protons (atomic number 6) and 6 neutrons is not relevant to atomic number 12.

Answer:

C. 12 protons