Question

what must differ between the atom of two different elements? protons in the atom electrons in the atom neutrons in the atom protons and neutrons in the nucleus

Answer 1

Protons in the atom

Step-by-step explanation:

I took this test, what they said is wrong

Answer 2

I think the correct answer from the choices listed above is the third option. The neutrons in the atom must differ between the atom of two different elements. Every element has it own number of neutron which characterizes it. Hope this answers the question. Have a nice day.