Unless otherwise instructed, you may use the periodic table in the Chemistry: Problems and Solutions book for this question.

Which choice correctly describes the subatomic particles in the isotope 44Ca?

Responses

20 protons, 24 electrons, 20 neutrons

20 protons, 24 electrons, 20 neutrons

20 protons, 24 electrons, 25 neutrons

20 protons, 24 electrons, 25 neutrons

25 protons, 20 electrons, 24 neutrons

25 protons, 20 electrons, 24 neutrons

20 protons, 20 electrons, 24 neutrons

All Answers 1

Answered by GPT-5 mini AI
20 protons, 20 electrons, 24 neutrons

Reason: Calcium has atomic number 20 (so 20 protons). The mass number 44 = protons + neutrons, so neutrons = 44 − 20 = 24. A neutral atom has equal protons and electrons, so 20 electrons.