Which choice correctly describes the subatomic particles in the isotope 45ca?

a. 20 protons, 20 electrons, 25 neutrons

b. 25 protons, 20 electrons, 24 neutrons

c. 20 protons, 20 electrons, 24 neutrons

d. 20 protons, 24 electrons, 20 neutrons

i think its a. correct me if i am wrong. you.

in the isotope Calcium-45, contains 20 protons, 20 electrons, and 25 neutrons are present.

Isotope:

it is an alternate form of an element (atom) that have same number of proton but different number of neutron.

Or an isotope have same atomic number but different atomic mass.

For Example-

₄₅Ca  (Calcium-45) is an isotope of calcium.

Atomic number or number of proton = 20

Number of neutrons - 25

Atomic mass = 45

Therefore, in the isotope Calcium-45, contains 20 protons, 20 electrons, and 25 neutrons are present.

To know more about Isotope,

link

The answer to your question is: Letter A is the correct one

Explanation:

₄₅Ca   =   protons = 20;  neutrons = 25; electrons = 20

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