Technically, any atom could have 40 electrons, but it would have a very weird charge. However, Zirconium has 40 electrons without being an ion.
The chemical symbol of uranium is 'U' and it has 92 electrons.
The chemical symbol for a magnesium atom that has lost two electrons is Mg2+.
A carbon-40 atom has 6 protons, 6 electrons, and 34 neutrons.
An atom of (^{40}_{18}\text{Ar}) (argon) has 18 electrons. This is because the number of electrons in a neutral atom is equal to the number of protons, and for argon, the atomic number is 18. Thus, an atom of argon has 18 protons and 18 electrons.
The symbol An doesn't exist.
Argon-40 atom has 18 electrons.
The chemical symbol of uranium is 'U' and it has 92 electrons.
The symbol for boron is B, and a neutral atom of boron has 5 electrons.
The symbol for antimony is Sb. A neutral atom of antimony has 51 electrons.
The symbol of a boron atom is "B", and the number of electrons in a neutral atom is the same as the number of protons, which equals the atomic number of boron: 5.
The symbol for xenon is Xe, and a neutral atom of xenon has 54 electrons.
The chemical symbol of chlorine is Cl. Atomic number of it is 17. It has 17 electrons.
The chemical symbol for a magnesium atom that has lost two electrons is Mg2+.
surely i don't know sodium atom which can be gained 2 electrons but anyway i thought the answer is Na+2
Zirconium is No. 40 in the Periodic Table. The '40' tells us the position of zirconium in the table, the number of protons in an atom , and the number of electrons in a neutrally charged atom. So the answer to you question is '40'.
Electron configuration of uranium: [Rn]5f36d17s2
The symbol for a sulfur atom that has gained 2 electrons is represented as S^2-.