alleryIsotopes have:
ADifferent element
BSame N
CSame Z (same element), different A (different N)
DSame A, different Z
Answer & Solution
Correct answer: C. Same Z (same element), different A (different N)
**Isotopes:** same Z (same element), different mass number A. Examples: ¹H, ²H (deuterium), ³H (tritium); ¹²C and ¹⁴C.
Chemically identical, physically different (mass).
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