Question

Write the electronic configurations and draw the structure of atom of the following elements .Also mention the no: of last shell electrons present in each of them. 1. CHLORINE 2. PHOSPHOROUS 3. SILICON 4. ALUMINIUM 5. SODIUM 6. NITROGEN 7. FLUORINE 8. OXYGEN 9. CARBON 10. LITHIUM

Answer 1

Answer:

This is why noble gases are least reactive because their outermost orbit is completely filled. However, the reactivity of other elements depends upon their capacity to gain noble gas configuration. It will also help to determine the valency of an atom.