Which statement about sodium and potassium is probably true?
A. Sodium and potassium are different isotopes of the same element.
B. Sodium and potassium have the same number of ...
C. Sodium and potassium are in the same chemical family.
D. Sodium and potassium have similar atomic masses.
Isotopes of a particular element are atoms that contain the same number of protons and electrons but have a different number of ... [ fact, you've probably ... of the sodium, the ... ...
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