Question

how can an atom be described as metal or nonmetal by electronic configuration?
class 9 structure of atoms

Answer 1

Answer:

Explanation:

⇒Metals have 1 or 3 valance electrons while non metals have 2,5 valance electrons.

⇒Atoms of metal elements give away electrons in their reactions  to form positive ions. The ions formed have a full of outer electron  shell, so are very stable.

⇒Atoms of reactive non-metals elements gain electrons in some of their reactions to form negative ions.