Write the spectral symbol for the terms of a two-electron system consisting a one `p` electron and one `d` electron.

An electron is in one of this electrons

What happens to electrostatic potential energy of a two electron system, if one electrons brought towards another electron?

Write the name & symbol of the element with electronic configuration 1s1 .

The radius of the shortest orbit in a one electron system is 18pm it may be

The radius of the shortest orbit in a one electron system is 18pm it may be

The radius of the shoetest orbit in a one electron system is 18 pm if may be

One ampere and one second =_______ electrons.

Write the spectral designations of the terms of the hydrogen atom whose electron is in the state with principle quantum number n=3

which is the symbol for an element whose ground state atoms have the same total numbers of s electrons and p electrons ?