RAYAT SHIKSHAN SANSTHA, SATARA
KARMAVEER VIDYA PRABODHINI, SATARA.
MADHYA VIBHAG
POWERPOINT PRESENTATION
9TH STD.-SCIENCE & TECHNOLOGY WITH SYLLABUS 2011-12
RAYAT SHIKSHAN SANSTHA,SATARA KARMAVEER VIDYA PRABODHINI,
MADHYA VIBHAG, SATARA
99THTH 4.COUNTING MATTER SCIENCE STD. 4.COUNTING MATTER SCIENCE STD. & TECH-PPT & TECH-PPT
UNIT :- COUNTING MATTER
SUB UNITS :-4.1..LAWS OF CHEMICAL COMBINATION4.2- THE ATOM 4.3- MOLECULE 4.4- MOLECULAR MASS &MOLE CONCEPT 4.5 – CHEMICAL FORMULAE OF COMPOUNDS
99THTH 4.COUNTING MATTER SCIENCE STD. 4.COUNTING MATTER SCIENCE STD. & TECH-PPT & TECH-PPT
RAYAT SHIKSHAN SANSTHA,SATARA KARMAVEER VIDYA PRABODHINI,
MADHYA VIBHAG, SATARA
99THTH 4.COUNTING MATTER SCIENCE STD. 4.COUNTING MATTER SCIENCE STD. & TECH-PPT & TECH-PPT
RAYAT SHIKSHAN SANSTHA,SATARA KARMAVEER VIDYA PRABODHINI,
MADHYA VIBHAG, SATARA
DEFINITIONMatter- Matter is anything around us that
we can perceive through our senses.
99THTH 4.COUNTING MATTER SCIENCE STD. 4.COUNTING MATTER SCIENCE STD. & TECH-PPT & TECH-PPT
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.
99THTH 4.COUNTING MATTER SCIENCE STD. 4.COUNTING MATTER SCIENCE STD. & TECH-PPT & TECH-PPT
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.
99THTH 4.COUNTING MATTER SCIENCE STD. 4.COUNTING MATTER SCIENCE STD. & TECH-PPT & TECH-PPT
RAYAT SHIKSHAN SANSTHA,SATARA KARMAVEER VIDYA PRABODHINI,
MADHYA VIBHAG, SATARA
SYMBOLSThe 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.”
99THTH 4.COUNTING MATTER SCIENCE STD. 4.COUNTING MATTER SCIENCE STD. & TECH-PPT & TECH-PPT
RAYAT SHIKSHAN SANSTHA,SATARA KARMAVEER VIDYA PRABODHINI,
MADHYA VIBHAG, SATARA
CHEMICAL SYMBOLS OF THE ELEMENTS
Hydrogen - Iron - ♂Copper - ©Sulphur -
99THTH 4.COUNTING MATTER SCIENCE STD. 4.COUNTING MATTER SCIENCE STD. & TECH-PPT & TECH-PPT
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 .
99THTH 4.COUNTING MATTER SCIENCE STD. 4.COUNTING MATTER SCIENCE STD. & TECH-PPT & TECH-PPT
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
99THTH 4.COUNTING MATTER SCIENCE STD. 4.COUNTING MATTER SCIENCE STD. & TECH-PPT & TECH-PPT
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.
99THTH 4.COUNTING MATTER SCIENCE STD. 4.COUNTING MATTER SCIENCE STD. & TECH-PPT & TECH-PPT
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.
99THTH 4.COUNTING MATTER SCIENCE STD. 4.COUNTING MATTER SCIENCE STD. & TECH-PPT & TECH-PPT
RAYAT SHIKSHAN SANSTHA,SATARA KARMAVEER VIDYA PRABODHINI,
MADHYA VIBHAG, SATARA
VALENCY- The combining capacity of an element is known as its valency .
99THTH 4.COUNTING MATTER SCIENCE STD. 4.COUNTING MATTER SCIENCE STD. & TECH-PPT & TECH-PPT
RAYAT SHIKSHAN SANSTHA,SATARA KARMAVEER VIDYA PRABODHINI,
MADHYA VIBHAG, SATARA
VALENCY- Hydrogen - Carbon - Sodium - Nitrogen - Oxygen -
1 4 1 3 2
99THTH 4.COUNTING MATTER SCIENCE STD. 4.COUNTING MATTER SCIENCE STD. & TECH-PPT & TECH-PPT
RAYAT SHIKSHAN SANSTHA,SATARA KARMAVEER VIDYA PRABODHINI,
MADHYA VIBHAG, SATARA
VALENCY- Neon - Aluminium - Chlorine - Calcium - Magnesium -
03122
99THTH 4.COUNTING MATTER SCIENCE STD. 4.COUNTING MATTER SCIENCE STD. & TECH-PPT & TECH-PPT
RAYAT SHIKSHAN SANSTHA,SATARA KARMAVEER VIDYA PRABODHINI,
MADHYA VIBHAG, SATARA
99THTH 4.COUNTING MATTER SCIENCE STD. 4.COUNTING MATTER SCIENCE STD. & TECH-PPT & TECH-PPT
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.
99THTH 4.COUNTING MATTER SCIENCE STD. 4.COUNTING MATTER SCIENCE STD. & TECH-PPT & TECH-PPT
RAYAT SHIKSHAN SANSTHA,SATARA KARMAVEER VIDYA PRABODHINI,
MADHYA VIBHAG, SATARA
Now, The valency of Sodium is +1 & The valency of bromine is -1.Now, Cross multiply the valencies Na Br
+1 -1 The formula of sodium bromide is NaBr
99THTH 4.COUNTING MATTER SCIENCE STD. 4.COUNTING MATTER SCIENCE STD. & TECH-PPT & TECH-PPT
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
99THTH 4.COUNTING MATTER SCIENCE STD. 4.COUNTING MATTER SCIENCE STD. & TECH-PPT & TECH-PPT
RAYAT SHIKSHAN SANSTHA,SATARA KARMAVEER VIDYA PRABODHINI,
MADHYA VIBHAG, SATARA
Now, The valency of Calcium is +2 & The valency of Sulphate is -2.Now, Cross multiply the valencies Ca So4
+2 -2 The formula of Calcium Sulphate is CaSo4
99THTH 4.COUNTING MATTER SCIENCE STD. 4.COUNTING MATTER SCIENCE STD. & TECH-PPT & TECH-PPT
RAYAT SHIKSHAN SANSTHA,SATARA KARMAVEER VIDYA PRABODHINI,
MADHYA VIBHAG, SATARA
RAYAT SHIKSHAN SANSTHA,SATARA
9TH STD.-SCIENCE & TECHNOLOGY WITH SYLLABUS 2011-12
MAHARAJA SAYAJIRAO VIDYALAYA, SATARA.
Shri . SAYYAD J. M.