The elements in which electrons are progressively filled in 4f - orbital are called_________.

A 4f orbital has

Which element is having 5 electrons in valence shell?

Which element is having last electron in 3p?

Which elements are having 2electrons in valencesub-shell?

Which elements contains 5 electrons in the outermost shell?

The elements in which the last electron enters into the p-orbitals of their outer-most shell are called p-blocks elements:- Name two allotrops of sulphur.

The elements in which the last electron enters into the p-orbitals of their outer-most shell are called p-blocks elements:- Give a method for the preparation of phosphine.

d- block elements belong to groups 3-12 in the periodic table, in which the d-orbitals are progressively filled What is misch-metal?

Which are the elements in which the last electron enters the d subshell?