Elements and Compounds Unit No: 06
When two or more elements chemically combine in
a fixed ratio by mass, the obtained product is known as a compound.
Introduction:
How
many estimated water molecules are present in one tablespoon of water?
a) six-hundred billion
b)
six billion
c) six-hundred billion trillion
d) six trillion
The entire physical universe is made up of…..
a) solid
b) liquid
c) gas
d) matter
The living and non-living world is made up of
a) light
b) heat
c) gas
d) matter
What is the smallest unit into which matter can be divided?
a) compounds
b) atoms
c) molecules
Explanation:An atom consists of a central nucleus that is surrounded by one or more negatively charged electrons.
