Formulae Of Compunds / Chrmical Reactions

Question 1

Rules to name a compond that contain a metal and a non metal?

Answer 1

• The name of the metal is given first
• And then the name of the non metal but ending with “-ide”

Eg: Sodium chloride, magnesium oxide, Iron sulfide.

Question 2

Rules to name a compond made of two Non-metals?

Answer 2

• If one is hydrogen, that is named first.
• Otherwise the one with the lower group jumber comes first.
• and then the name of the other non metal ending with “-ide”

Eg: hydrogen chloride, carbon dioxide

Question 3

The formula of a compound is related to its structure. Explain 2 different kind of structures.

Answer 3

• In GIANT stuctures, the formula tells u the RATIO of the ions or atoms in a compond.
• In a molecular compound, tje formula tells u EXACTLY how many atoms are bonded together in each molecule.

Question 4

What is valency?

Answer 4

The valency of an element is the number of electrons its atoms it loses, gain or share, to form a compound.