What must differ between the atom of two different elements?

a: protons in the atom
b: electrons in the atom
c: neutrons in the atom
d: protons and neutrons in the nucleus

if you. no guessing .

protons in the atom

Explanation:

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Atoms Quiz- Grade 8 Unit 2 Lesson 2

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answer; humanistic;

answer; the changing age structure of the population;