Question

A nuclide of Superscript 64 subscript 29 upper C u. absorbs a positron. Which is the resulting atom?
Superscript 65 subscript 29 upper C u.
Superscript 63 subscript 29 upper C u.
Superscript 64 subscript 28 upper N i.
Superscript 64 subscript 30 upper Z n.

Answer 1

Absorbing a positron converts a neutron to a proton (Z increases by 1, A stays the same). So ^64_29Cu → ^64_30Zn.