atom

atom

1. Welcome

2. Basic concept of chemistry

3. Chemistry

4. Matter
Matter = any material
substance with Mass
& Volume

5. Matter
Solid
Liquid
Gas
comes in 3 phases

6. Solid
Definite Shape
Definite Volume

7. Liquid
Indefinite Shape–
takes the shape of the
container
Definite Volume

8. Gas
Indefinite Shape–
takes the shape of
the container
Indefinite Volume–
can expand and be
compressed

9. Elements one of the 100+ pure substances
that make up everything in the universe

10. Examples of Elements
H= Hydrogen
C= Carbon
O= Oxygen
N= Nitrogen
S= Sulfur
Na= Sodium
Ca= Calcium
K= Potassium
I= Iodine
Cl= Chlorine
P= Phosphorus

11. Atom the smallest particle making up elements

12. Sub-atomic Particles
Protons p
+
-positive
charge, in nucleus
Electrons -e
-
negative charge, orbiting nucleus
Neutrons n
0
–no charge,
in nucleus

13. Drawing an Atom of Carbon
C
12.011
6
Atomic Mass
Atomic #
minus Atomic # = # of n
0
= # of p
+
and # of e
-
Carbon has 6 p
+
and 6 e
-
Carbon has 6 n
0

14. Drawing an Atom of Carbon
6 p
+
6 n
0
e
-
e
-
e
-
e
-
e
-
e
-

15. Compounds
Compounds -2 or more elements
chemically combined to form
a new substance with
new properties
Properties–The way a chemical
substance looks and behaves

16. Compounds
Compounds –are made of 2 or
more different atoms combined to
form Molecules
H + O H
2O =
H
O
H
Chemical formulalists the
number of different atoms
in a single molecule
Structural formulashows
the arrangement of the
atoms in a single molecule

17. Molecules
Glucose Sugar
C
6H
12O
6
Chemical formula
C
H
OH
C C
C
C C
H
H
H
H
H
H
OH
O
OH
HO
OH
Structural formula

18. Compounds
Inorganic
Compounds
or
Organic
Compounds
•usually don’t contain
Carbon
•generally come from the
earth
•generally simple molecules
•always contain C & H and
usually O, N, sometimes
S & P
•originate in organisms
•generally complex molecules

19. Examples of Inorganic
Compounds
H + O= H
2O = Water
H + Cl= HCl = Hydrochloric Acid
C + O= CO
2= Carbon Dioxide
Na + Cl= NaCl = Common Table Salt

20. Examples of Organic
Compounds
C, H + O Carbohydrates = Sugars,
starches & cellulose
C, H + O Lipids = Fats & Oils
C, H, O, N, &
sometimesP + S
Proteins
C, H, O, N, + P Nucleic Acids –DNA & RNA

21. Presented by pruthviraj shirsath
Shadab chaudhary
Guided by:-Miss. Ankita Joshi