Question

question 6 what is the atomic number of an element? a the total mass of an atom b the number of electrons in the outer shell c the number of protons in the nucleus of an atom d the total number of neutrons in an atom

Explanation:

The atomic number of an element is defined as the number of protons in the nucleus of an atom of that element. Option A is the atomic mass (sum of protons and neutrons), Option B refers to valence electrons (outer shell electrons), and Option D is the number of neutrons (which can be found by subtracting atomic number from atomic mass). So the correct option is C.

Answer:

C. The number of protons in the nucleus of an atom