Regents Chemistry Exam June 2024 Question 18
18 An element is composed of atoms that must have
(1) the same atomic mass
(2) the same atomic number
(3) a different number of protons
(4) a different number of electrons
Solution:
All atoms of the same element must have the same atomic number, which is equal to the number of protons. Choice 2 is the correct answer choice
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