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 ?

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

Write the electronic configuration of the element with atomic number 102 .

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

An atom of element E contains 3 protons, 3 electrons and 4 neutrons : (a) What is its atomic number ? (b) What is its mass number ? (c) Write the electronic configuration of the element E (d) State whether element E is a metal or non-metal. Why ? (e) What type of ion, cation of anion, will be formed by an atom of element E ? Why ? (f) Write the symbol of the ion formed by an atom of element E (g) What could element X be ?

The electronic configuration of an element with atomic number 7 i.e. nitrogen atom is.

Write the name , symbol and electronic configuration of an element X whose atomic number is 11.