This is how zirconium appears in the periodic table.

Question

A purple box has Z r at the center and 40 above. Below it says zirconium and below that 91.22.

Rounded to the nearest whole number, how many electrons are in an atom of zirconium?

40
51
91
131

Answer 1

The atomic number of zirconium (Zr) is 40, which is indicated at the top of the box. The atomic number corresponds to the number of protons in an atom, and in a neutral atom, the number of electrons is equal to the number of protons.

Since zirconium has an atomic number of 40, it has 40 electrons in a neutral state.

Therefore, the answer is 40.