mohit science presentation

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NON -METALS

INTRODUCTION Physical properties of

Non-metals.Chemical properties of non-metals.Uses of non-metals.

PHYSICAL PROPERTIES OF

NON-METALS.

Properties of metals

They are generally in solid and gaseous at room temp.EXCEPTIONAL CASE : BROMINE ,which is liquid at room temprature.

Properties of metals

Tensile strength:Nonmetals are not hard ,so they break easily.EXCEPTIONAL CASE : DIAMOND is the hardest substance.

Properties of metals

Nonmetals do not have luster; they are dull.

Properties of metals

BrittleNonmetals are brittle so they break easily. This means nonmetals ARE NOT ductile or malleable.

Properties of metals

Nonmetals have low density, they can break easily.

Properties of metals

They also have a low melting point. That is why they are poor conductors of heat & electricity.EXCEPTIONAL CASE : GRAPHITE ,which is good conductor

CHEMICAL PROPERTIES OF

NON-METALS.

Reaction withOxygen.

Non-metals forms their oxides when react with oxygen.

When carbon is burnt in air, it forms carbon dioxide. You can observe that when coal (carbon) is burnt it forms smoke, which contains carbon dioxide.

USES OF

NON- METALS.

OXYGENOxygen is used in breathing systems by patients.

CHLORINEChlorine is use for purifying water.

PHOSPORUSPhosporus is use to manufacture matchsticks & fertilizers.

CARBONCarbon is usedin making diamond.

NITROGENNitrogen is used inmanufacture of fertilizers and ammonia.

SILICONSilicon is used in making semiconductorsfor microchips.

PROJECT BY-:MOHIT KHAIRNAR.MOHIT MULCHANDANI.KRISH PATEL.HARSHIT SINGHAL.VARUN SUTHAR.ANIKET PANIHAR.

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