Structure of Atom for class 7

1. A PRESENTATION ON
CHEMISTRY
STRUCTURE OF MATTER
BY
AVISHI SHARMA CLASS 7 H
MENTOR
MR.PRINCE SACHDEVA

3. WHAT IS
MATTERMATTER IS
ANYTHING
WHICH HAS
SOME MASS OR

4. ATOM
. MATTER IS MADE UP OF
SEVERAL SMALL PARTICLES
Called atom. ATOM IS THE
BASIC UNIT
OF MATTER

5. MOLECULE When two or more atom are
linked together they make a larger particle
called molecule. Molecule can be made up of
like or alike atom eg .Oxygen gas molecule is
made up of two oxygen atoms bonded
together

7. ELEMENTS – An element,
such as gray, metallic sodium,
is a substance that cannot be
broken down into simpler ones
by chemical changesthere are 118 elements known today
and 96 in nature and rest by
humans
There are two types of elements
which will be introduced in further

8. COMPOUNDS- A pure substance
containing two or more elements
combined together in a fixed
proportion by weight can be
decomposed into these element by
suitable method eg- H2O etc.