An atom has electronic configuration 2,8,7. What is the atomic number of this elements?

An element has 2 electrons in the M shell. What is the atomic number of the element ?

An atom has electronic configuration 2,8,7. To which of the following element would it be chemically similar?(atomic number are given in following N(7),F(9),Ar(18)

What is electronic configuration of atoms ?

Write electronic configuration of elements with atomic number 17 , 29

An element has the electronic configuration 2,8,3 what is its group number in modern periodic table?

The atom of an element X has 7 electrons in its M shell. What is the atomic number of element X ?

Write the electronic configuration of an element X whose atomic number is 12.

What is the electronic configuration of a hydrogen atom ?