Question

Which element below could be an isotope of beryllium

sodium-10
beryllium-10
boron-9
carbon-9​

Answer 1

beryllium

Step-by-step explanation:

isotopes are same elements

Answer 2

beryllium-10

Step-by-step explanation:

First let's remember what an isotope is

Isotopes are atoms of the same element, whose nucleus have a different amount of neutrons, and therefore, differ in mass number .

Since isotopes are atoms of the same element, the only option that corresponds to beryllium is the option beryllium-10