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.

Question

Quizplus · Accepted Answer

The atomic number of technetium is 43, which means it has 43 protons. The mass number is 99, so it has 99 - 43 = 56 neutrons. The ion has a +1 charge, meaning it has one less electron than protons, so it has 42 electrons.

Technetium Often Is Used to Image Areas of Bone Growth 439Tc+{ } _ { 43 } ^ { 9 } T c ^ { + }439​Tc+

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