Question

Pick the correct statement for the following isotope: 42Ca

42 is the mass number and 20 is the atomic number.

42 is the number of neutrons and 20 is the number of protons.

42 is the number of protons and 20 is the number of electrons.

42 is the atomic number and 20 is the number of neutrons.

Answer 1

C. 42 is the number of neutrons and 20 is the number of electrons

Answer 2

wait no it's A

Answer 3

The atomic number of Ca is 20. The mass number of ⁴²Ca is 42, so the correct answer is 1: mass number = 42, atomic number = 20.

Answer 4

Thanks

Answer 5

np