The 71st electron of an element X with an atomic number of 71 enters into the orbital :

The 71^(st) electron of an element X with an atomic number of 71 enters into the orbital

The 71^(st) electron of an element X with an atomic number of 71 enters into the orbital

The 71^(st) electron of an element X with an atomic number of 71 enters into the orbital

The mass number of an element is twice its atomic number. If there are four electrons in 2p orbitals, Write the electronic configuration of the element and name it.

Elements having atomic numbers 57 to 71 consistute the lanthanide series. ]

The atomic number of an element is 35. what is the total number of electrons present in all the p-orbitals of the ground state atom of that element ?

The atomic number of an element is 35. What is the toal number of electrons present in all the p-orbitals of the ground state atom of that element?

The atomic number of an element X is 19. The number of electrons in its ion X^(+) will be