TNPSC Free Notes Chemistry – Elements and Compounds Part 1

இந்தக் கட்டுரையில், TNPSC குரூப் 1, குரூப் 2, குரூப் 2A, குரூப் 4 மாநிலப் போட்டித் தேர்வுகளான TNUSRB, TRB, TET, TNEB போன்றவற்றுக்கான  முறைகள் இலவசக் குறிப்புகளைப் பெறுவீர்கள்.தேர்வுக்கு தயாராவோர் இங்குள்ள பாடக்குறிப்புகளை படித்து பயன்பெற வாழ்த்துகிறோம்.

Elements and Compounds

Matter

• Anything that occupies space
• Have mass and volume

State of Matter

• Solid
• Liquid
• Gas
• Plasma
• Bose Einstein Condensate

Solids

• In solid, the particles are tightly packed with very little space between them.
• The interatomic space is very high.
• Eg. Stone

Liquids

• Particles in liquids are arranged in a random or irregular way and the space between the particles is greater than that in solids.

Eg. water

• Liquid atoms are packed more loosely which allows things to be able to pass through it
• Liquid is effected by gravity more than anything
• Liquids are always moving due to gravity around it

Gases

• The particles in the gases are arranged far apart. They move freely.
• Eg. Air
• A gas atoms are spread out so far, you can walk through it without any restriction
• Gas is not affected by gravity
• The gas’s atoms never stop moving and it never stays in place .

Plasma

• Superheated gaseous state
• Example: Lightning, Aurora, Sun & star

Bose Einstein Condensate

• Super cooled solids
• Near absolute zero (0 K or -273.15 degree Celsius) 

Composition of Matter

• Atom (smallest particle of an element)
• Example: C, N, O, Na
• Molecules (smallest particle of pure substance)
• Example: O2, O3

Classification of matter

Pure substance

• A pure substance is made up of only one kind of particles.
• Pure substances may be elements or compounds.

Mixtures

• A Mixture is an impure substance and contains more than one kind of particles.
• In the mixture the components are mixed in any proportion.

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