Science State Std 8 L No. 7 Metals And Non Metals

Front 1

Sonorous

Back 1

Producing sound

Front 2

Lustre

Back 2

radiant in character, glow or shiny

Front 3

Corrosion

Back 3

to weaken or destroy gradually

Front 4

ductility

Back 4

ability of material to change

its shape (drawn out into wire

or thread )

Front 5

Malleability

Back 5

ability of extending by hammering (drawn out into sheets)

Front 6

density

Back 6

a mass per unit volume (degree of compactness)

Front 7

Suspension

Back 7

It is a heterogeneous mixture

( particles are big enough

to settle)

Front 8

homogeneous mixture

Back 8

mixture made up of same kind of constituents

Front 9

allotrope

Back 9

a form showing allotrophy the existence of a substance and

especially an

in two or more

different forms (as of crystals)

usually in the same phase

Front 10

Varnish

Back 10

an a liquid preparation when

applied to a surface dries to

form hard lustrous typically transparent coating

Front 11

Metal

Back 11

solid substance that is hard

and shiny, can conduct heat

and electricity

Front 12

Non - metal

Back 12

a chemical element that lacks

the characteristics of a metal

Front 13

Exception

Back 13

exclusion

Front 14

Splinter

Back 14

a small piece of wood, metal

or glass broken from larger piece.

Front 15

Ion

Back 15

an atom or group of atom that

carries a positive or negative

electric charge due to loosing or gaining electrons

Front 16

Alloy

Back 16

A compound, mixture or union

of two different things

Front 17

Scrap

Back 17

discarded articles, useful while reprocessing

Front 18

adverse

Back 18

acting against

Front 19

rust

Back 19

a reddish coating formed on

iron when chemically attacked

by moist air.