Question

An atom of strontium has at least four different isotopes. What is different between

an isotope of Sr and an isotope of
86
87
Sr?
the number of protons in the nucleus
the number of neutrons in the nucleus
the size of the nucleus
the number of electrons in the atom

Answer 1

the number of neutrons in the nucleus

Step-by-step explanation:

Answer 2

B. the number of neutrons in the nucleus

Step-by-step explanation:

Isotopes are atoms of the same element that have different numbers of neutrons but the same number of protons and electrons