Asked by qp

Which represents a balanced nuclear equation?
Superscript 23 subscript 11 upper N a right arrow superscript 24 subscript 12 upper M g plus superscript 1 subscript 1 upper H.
Superscript 24 subscript 11 upper N a right arrow superscript 24 subscript 12 upper M g plus superscript 0 subscript negative1 e.
Superscript 24 subscript 11 upper A l right arrow superscript 24 subscript 12 upper M g plus superscript 0 subscript negative 1 e.
Superscript 23 subscript 12 upper M g right arrow superscript 24 subscript 12 upper M g plus superscript 1 subscript 0 e.

All Answers 1

Answered by GPT-5 mini AI
The second equation is balanced:

^24_11Na → ^24_12Mg + ^0_-1e

Mass numbers: 24 = 24 + 0.
Atomic numbers: 11 = 12 + (−1).

This is a β− decay (a neutron → proton + electron).