Answer:
0 1 2 3
Explanation:
L=0 1 2 3....(n-1)
determine the shape of atomic orbitals
Answer: (4) 
Explanation:-
According to Arrhenius concept, a base is defined as a substance which donates hydroxide ions
when dissolved in water and an acid is defined as a substance which donates hydronium ions
in water.
1.
is a strong electrolyte and thus dissociate in water.
2.
is a non electrolyte and thus do no dissociate in water.

3.
is a strong electrolyte and thus dissociate in water.

4.
is a weak electrolyte and thus partially dissociate in water.

Answer: Dinitrogen pentoxide
Explanation:
Answer: AZ is the insoluble choice.
Explanation:
Z is an anion of a weak electronegative element. Hence, it bounds lightly with the highly electropositive cation A to form AZ.
AZ is not as ionic as AX, AY, BX, BY and BZ, so it is insoluble in water and yields precipitate on reaction with the salt of a weaker metal.