Question

Ch 3 question and anwenser write down the formulae of: Sodium oxide and Aluminium chloride

Answer 1

$\boxed{\boxed{\boxed{\bold{\red{Hey!\: Here's\: your \: solution}}}}}$
______________________________

(1) Sodium Oxide

==> Symbol of Sodium is Na and it's valency is 1, and symbol of Oxygen is O and it's valency is 2. Hence, by criss-cross method, chemical formula of Sodium Oxide is -

Na______O

1________2

==> NaO2

$\purple{Hence,\: Sodium\: Oxide\: is \: NaO2}$
______________________________

(2) Aluminum Chloride

==> Symbol of Aluminum is Al and it's valency is 3, and symbol of Chlorine is Cl and it's valency is 1. Hence, by criss-cross method, the chemical formula of Aluminum Chloride is -

Al_______Cl

3________1

==> AlCl3

$\blue{Hence,\: Aluminum\: Chloride\: is \: AlCl3}$
______________________________

$\green{Hope\: the\: answer \: helps \: you}$

Answer 2

Answer:

Sodium Oxide : Na2O

Aluminium Chloride : AlCl4

Explanation: