Question

If Atom $1$ has 19 protons and 22 neutrons and Atom $2$ has 20 protons and 22 neutrons, are these isotopes of the same element?

• A. There is not enough information to determine this.
• B. No, because they have different numbers of protons.
• C. No, because they have the same number of neutrons.
• D. Yes, because they have different numbers of protons.
• E. Yes, because they have the same number of neutrons.

Answer 1

The correct option is B No, because they have different numbers of protons.

If Atom $1$ has 19 protons and 22 neutrons and atom $2$ has 20 protons and 22 neutrons, these are not isotopes of the same element. Because they have different numbers of protons. Isotopes have same number of protons but different number of neutrons.