A radioactive nuclide emits a positron and transforms into

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

Problem

A radioactive nuclide

X

emits a positron and transforms into

^{18}_{8}\mathrm{O}

. Which of the following is

X

? (a)

^{18}_{7}\mathrm{N}

(b)

^{18}_{8}\mathrm{O}

(c)

^{18}_{9}\mathrm{F}

(d)

^{17}_{8}\mathrm{O}