Answer:
(a) (i) All the elements of a group have similar chemical properties because they have same no. of valence electrons in their outermost shell. (ii) All the elements of a period have different chemical properties because they have different no. of valence electrons in their atoms.
Answer:
They are already matched for you. It goes
1.
2.
3.
in the order of the questions.
Answer:
Noble gases have a complete valence electron shell making them stable and nonreactive.
Explanation:
Covalent for the first one
