Technetium Often Is Used to Image Areas of Bone Growth ${ } _ { 43 } ^ { 9 } T c ^ { + }$

Multiple Choice

Technetium often is used to image areas of bone growth because it is a radioisotope with a half-life of 6 hours that emits gamma rays. A ${ } _ { 43 } ^ { 9 } T c ^ { + }$ ion has __________ protons, __________ neutrons, and __________electrons.

A) 99, 43, 98
B) 43, 99, 42
C) 43, 56, 42
D) 56, 43, 43
E) 43, 99, 43