4
AssignmentMultiple Choice

Types of Radioactive Decay

Question 4 • 2001310 Earth Science Sem 1 - Reeves

Which statement about isotopes is correct?

Answer
A
Isotopes are different elements with different numbers of protons but the same number of neutrons.
B
Isotopes are the same element with different numbers of protons and different numbers of neutrons.
C
Isotopes are the same element with the same number of protons but different numbers of neutrons.

Explanation

An element is defined by its number of protons. Isotopes are atoms of the same element, so they have the same number of protons, but they differ in their number of neutrons. Therefore, the correct statement is that isotopes are the same element with the same number of protons but different numbers of neutrons.

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