Question

1. every atom of a given element has the same number of

________ and ________.

Explanation:

The atomic number of an element is defined as the number of protons in the nucleus of an atom of that element. For a neutral atom, the number of electrons is equal to the number of protons. Different isotopes of an element have the same number of protons (and thus electrons in a neutral state) but different numbers of neutrons. However, the question is about "every atom of a given element", and the fundamental characteristic that defines an element is the number of protons. And in a neutral state (which is the common state when not specified otherwise), the number of electrons is equal to the number of protons.

Answer:

protons; (neutral - state) electrons