Question

Which element has 30 protons and 35 neutrons?

A) Zinc-65
B) Zinc-65m
C) Zinc-64
D) Zinc-64m

Answer 1

The element with 30 protons is zinc, and an isotope with 30 protons and 35 neutrons has a mass number of 65, so the correct answer is A) Zinc-65.

Step-by-step explanation:

To identify the element with 30 protons and 35 neutrons, you look at the atomic number for the element which corresponds to the number of protons. In this case, an element with 30 protons is zinc (Zn). For isotopes, the mass number equals the sum of protons and neutrons, so the isotope of zinc with 35 neutrons would have a mass number of 30 (protons) + 35 (neutrons) = 65. This means the correct answer is Zinc-65, which is denoted as A) Zinc-65.