Belongs to III gp

CHEMISTRY · Single correct · US High School · Chemistry · Atomic Structure & Nuclear · Atomic Structure & Nuclear

Problem

90232Th^{232}_{90}\text{Th} belongs to III gp. It emits an α\alpha-particle. The daughter element belongs to: (1) I gp. (2) II gp. (3) III gp. (4) IV gp.

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