1. RAYAT SHIKSHAN SANSTHA, SATARA
KARMAVEER VIDYA PRABODHINI,
SATARA.
MADHYA VIBHAG
POWERPOINT PRESENTATION
9TH STD.-SCIENCE & TECHNOLOGY
WITH SYLLABUS

2. UNIT :- COUNTING MATTER SUB UNITS :-4.1..LAWS OF CHEMICAL COMBINATION
RAYAT SHIKSHAN SANSTHA,SATARA
KARMAVEER VIDYA PRABODHINI,
MADHYA VIBHAG, SATARA
UNIT :- COUNTING MATTER
SUB UNITS :-4.1..LAWS OF CHEMICAL COMBINATION
4.2- THE ATOM
4.3- MOLECULE
4.4- MOLECULAR MASS &MOLE CONCEPT
4.5 – CHEMICAL FORMULAE OF COMPOUNDS
9TH COUNTING MATTER SCIENCE STD & TECH-PPT

3. RAYAT SHIKSHAN SANSTHA,SATARA KARMAVEER VIDYA PRABODHINI,
MADHYA VIBHAG, SATARA
9TH COUNTING MATTER SCIENCE STD & TECH-PPT

4. Matter Solid Liquid Gaseous
RAYAT SHIKSHAN SANSTHA,SATARA
KARMAVEER VIDYA PRABODHINI,
MADHYA VIBHAG, SATARA
Matter
Solid
Liquid
Gaseous
9TH COUNTING MATTER SCIENCE STD & TECH-PPT

5. RAYAT SHIKSHAN SANSTHA,SATARA
KARMAVEER VIDYA PRABODHINI,
MADHYA VIBHAG, SATARA
Definition
Matter-
Matter is anything around us that we can perceive through our senses.
9TH COUNTING MATTER SCIENCE STD & TECH-PPT

6. Law of conservation of matter
RAYAT SHIKSHAN SANSTHA,SATARA
KARMAVEER VIDYA PRABODHINI,
MADHYA VIBHAG, SATARA
Law of conservation of matter
“Matter is neither gained nor lost during a chemical reaction.” This is called the law of conservation of matter.
9TH COUNTING MATTER SCIENCE STD & TECH-PPT

7. Law of constant proportion -
RAYAT SHIKSHAN SANSTHA,SATARA
KARMAVEER VIDYA PRABODHINI,
MADHYA VIBHAG, SATARA
Law of constant proportion -
“In a compound, constituent elements are always present in a definite proportion by weight.” It is called the law of constant proportion.
9TH COUNTING MATTER SCIENCE STD & TECH-PPT

8. Symbols The symbol of any element indicates one atom of that element.
RAYAT SHIKSHAN SANSTHA,SATARA
KARMAVEER VIDYA PRABODHINI,
MADHYA VIBHAG, SATARA
Symbols
The symbol of any element indicates one atom of that element.
Symbol of the element is the first letter of the name of the element or first letter and second/other prominent letter in the name.”
9TH COUNTING MATTER SCIENCE STD & TECH-PPT

9. Chemical symbols of the elements
RAYAT SHIKSHAN SANSTHA,SATARA
KARMAVEER VIDYA PRABODHINI,
MADHYA VIBHAG, SATARA
Chemical symbols of the elements
Hydrogen -
Iron ♂
Copper ©
Sulphur
9TH COUNTING MATTER SCIENCE STD & TECH-PPT

10. Molecule - RAYAT SHIKSHAN SANSTHA,SATARA KARMAVEER VIDYA PRABODHINI,
MADHYA VIBHAG, SATARA
Molecule -
Molecule is made up of two or more atoms of elements. Atoms of some elements exist independently. e.g.- H2 , Cl2 , O2 .
9TH COUNTING MATTER SCIENCE STD & TECH-PPT

11. Molecular mass - masses of the atoms present in a
RAYAT SHIKSHAN SANSTHA,SATARA
KARMAVEER VIDYA PRABODHINI,
MADHYA VIBHAG, SATARA
Molecular mass -
‘The sum of the atomic
masses of the atoms present in a
given molecule is the molecular
mass of the substance.’
e.g.- Molecular mass of CO2 = 44 and H2O= 18
9TH COUNTING MATTER SCIENCE STD & TECH-PPT

12. Mole - RAYAT SHIKSHAN SANSTHA,SATARA KARMAVEER VIDYA PRABODHINI,
MADHYA VIBHAG, SATARA
Mole -
A collection of Avogadro’s number objects of the same type (such an atoms or molecules) is called a mole.
9TH COUNTING MATTER SCIENCE STD & TECH-PPT

13. Radicals - RAYAT SHIKSHAN SANSTHA,SATARA KARMAVEER VIDYA PRABODHINI,
MADHYA VIBHAG, SATARA
Radicals -
Atoms or group of atoms having a positive or negative charge are known as radicals.
9TH COUNTING MATTER SCIENCE STD & TECH-PPT

14. Valency- RAYAT SHIKSHAN SANSTHA,SATARA KARMAVEER VIDYA PRABODHINI,
MADHYA VIBHAG, SATARA
Valency-
The combining capacity of an element is known as its valency .
9TH COUNTING MATTER SCIENCE STD & TECH-PPT

15. Valency- 4 3 2 1 Carbon - Sodium - Nitrogen - Oxygen -
RAYAT SHIKSHAN SANSTHA,SATARA
KARMAVEER VIDYA PRABODHINI,
MADHYA VIBHAG, SATARA
Valency- 1 4 3 2
Hydrogen
Carbon
Sodium
Nitrogen
Oxygen
9TH COUNTING MATTER SCIENCE STD & TECH-PPT

16. Valency- Neon - Aluminium - Chlorine - Calcium - Magnesium - 0 3 1 2
RAYAT SHIKSHAN SANSTHA,SATARA
KARMAVEER VIDYA PRABODHINI,
MADHYA VIBHAG, SATARA
Valency-
Neon - Aluminium - Chlorine - Calcium - Magnesium -
9TH COUNTING MATTER SCIENCE STD & TECH-PPT

17. Chemical formulae of compounds RAYAT SHIKSHAN SANSTHA,SATARA
KARMAVEER VIDYA PRABODHINI,
MADHYA VIBHAG, SATARA
Chemical formulae
of compounds
9TH COUNTING MATTER SCIENCE STD & TECH-PPT

18. Sodium bromide - The formula is obtain as follows –
RAYAT SHIKSHAN SANSTHA,SATARA
KARMAVEER VIDYA PRABODHINI,
MADHYA VIBHAG, SATARA
Sodium bromide -
Chemical formula of Sodium bromide is NaBr.
The formula is obtain as follows –
Symbol of Sodium is - Na &
Symbol of Bromine is – Br.
9TH COUNTING MATTER SCIENCE STD & TECH-PPT

19. RAYAT SHIKSHAN SANSTHA,SATARA KARMAVEER VIDYA PRABODHINI,
MADHYA VIBHAG, SATARA
Now,
The valency of Sodium is +1
& The valency of bromine is -1.
Cross multiply the valencies
Na Br
The formula of sodium bromide
is NaBr
9TH COUNTING MATTER SCIENCE STD & TECH-PPT

20. Calcium sulphate - Chemical formula of Calcium sulphate is NaBr.
RAYAT SHIKSHAN SANSTHA,SATARA
KARMAVEER VIDYA PRABODHINI,
MADHYA VIBHAG, SATARA
Calcium sulphate -
Chemical formula of Calcium sulphate is NaBr.
The formula is obtain as follows –
Symbol of Calcium is - Ca &
Symbol of Sulphate is – So4
9TH COUNTING MATTER SCIENCE STD & TECH-PPT

21. RAYAT SHIKSHAN SANSTHA,SATARA KARMAVEER VIDYA PRABODHINI,
MADHYA VIBHAG, SATARA
Now,
The valency of Calcium is +2
& The valency of Sulphate is -2.
Cross multiply the valencies
Ca So4
The formula of Calcium Sulphate
is CaSo4
9TH COUNTING MATTER SCIENCE STD & TECH-PPT

22. RAYAT SHIKSHAN SANSTHA, SATARA
MAHARAJA SAYAJIRAO VIDYALAYA, SATARA.
Shri . SAYYAD J. M.
9TH STD.-SCIENCE & TECHNOLOGY
WITH SYLLABUS