The atom of an element X has 7 electrons in its M shell
(a) Write the electronic configuration of element X.
(b) What is the atomic number of element X?
(c) Is it a metal or a non-metal?
(d) What type of ion will be formed by an atom of element X? Write the symbol of the ion formed.
(e) What could element X be?
(a) The electronic configuration of element X is 2, 8, 7.
(b) The atomic number of element X is 17.
(c) Element X is a non-metal.
(d) Anion will be formed by an atom of element X. The symbol of the ion formed will be X−.
(e) It should must be chlorine (Cl).