Question

an isotope of an element is the same element (same atomic number) but with a different number of protons. neutrons. electrons. quarks

Explanation:

Isotopes of an element have the same atomic number (same number of protons). The atomic number defines the element. Electrons are involved in chemical bonding and can vary in ions. Quarks are sub - particles of protons and neutrons. Isotopes differ in the number of neutrons. For example, carbon - 12 and carbon - 14 are isotopes of carbon. Carbon - 12 has 6 neutrons (\(12 - 6\) (protons) \(=6\)) and carbon - 14 has 8 neutrons (\(14 - 6=8\)).

Answer:

neutrons.