1) uranium atom has atomic number 92, so it has 92 electrons and has symbol U.
2) chlorine atom has atomic number 17, so it has 17 electrons and has symbol Cl.
3) boron atom has atomic number 5, so it has 5 electrons and has symbol B.
4) iodine atom has atomic number 53, so it has 53 electrons and has symbol I.
In a neutral atom, the atomic number is equal to the number of electrons and protons.
