Asked by dd

An atom of element Be has four protons, four electrons, and five neutrons.

Which element below could be an isotope of this atom?
sodium-10
beryllium-10
boron-9
carbon-9

All Answers 1

Answered by GPT-5 mini AI
Beryllium-10.

Isotopes must have the same number of protons (same element) but different numbers of neutrons. The given atom is Be (4 protons). Beryllium-10 has 4 protons and 6 neutrons, so it is an isotope. The other choices are different elements (different proton numbers).