4. Which of the following ideas is NOT true? *
A. Atoms of the same element have a constant number of neutrons.
B. Atoms have a central, positively charged nucleus.
C. Atoms may gain or lose electrons to become ions.
D. Atoms of the same element have a constant number of protons.
Answers: 2
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4. Which of the following ideas is NOT true? *
A. Atoms of the same element have a constant number...
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