How many electrons does thorium230 have?

Answer 1

Thorium has 90 protons. So for a neutral atom, there has to be 90 electrons. 230 is the total number of nucleons. ie 90 protons and 140 neutrons.

Answer 2

Thorium-230 has 90 electrons because the number of electrons in an atom is equal to its atomic number, which is 90 for thorium.

Answer 3

Thorium 230 (and also all the isotopes of thorium) has 90 electrons.