Question

Carlos arranges his notes about radioactive decay in a graphic organizer. He wants to add the labels shown.

Label 1: Photon
Label 2: Positron
Label 3: No change in mass number

A venn diagram with 2 intersecting circles with the left circle labeled gamma decay and the right labeled beta decay. There is an X in the gamma decay circle. There is a Z in the beta decay circle. There is a Y in the intersecting area.

Which is the best region for each label?

Label 1: Z
Label 2: X
Label 3: Y
Label 1: X
Label 2: Z
Label 3: X
Label 1: X
Label 2: Z
Label 3: Y
Label 1: X
Label 2: Z
Label 3: Z

Answer 1

Correct choice: Label 1: X, Label 2: Z, Label 3: Y.

Reason: A photon is emitted in gamma decay (gamma-only region X). A positron is emitted in beta decay (beta-only region Z). "No change in mass number" applies to both gamma and beta decay, so it goes in the intersection Y.