Question

which of the following correctly describes the subatomic particles in the isotope $^{44}$ca?
25 protons, 20 electrons, 24 neutrons
20 protons, 24 electrons, 20 neutrons
20 protons, 20 electrons, 24 neutrons
20 protons, 24 electrons, 25 neutrons

Explanation:

Step1: Find atomic number of Ca

Calcium (Ca) has atomic number 20, so protons = 20.

Step2: Determine electrons

Neutral atom: electrons = protons = 20.

Step3: Calculate neutrons

Mass number = 44, neutrons = 44 - 20 = 24.

Answer:

20 protons, 20 electrons, 24 neutrons