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Answers
Answer:
answer 1 lusture
answer2 mercury
answer 3 silicon
answer4 it is defined as the ratio of current density in the material to the electric field which causes the flow of current
answer 5 magnox
answer 6 three characteristics of metals are
1. electropositive in nature
2.ductile
3.higher lattice enthalpy
Explanation:
answer7.non ductile
electron acceptor
brittle
I THINK IT'S ENOUGH I CAN'T TYPE SO MUCH
Answer:
1.lustrous
2.mercury
4.rate of flow of charges is electrical current
5.amalgam
6.sonorous
ductile
malleable
7.soft
bad conductor of heat and electricity
8.the slow distruction of metals due to its contact with atmosphere and water
9.yes,in the case of aluminum,when it is exposed to air ,it undergoes corrosion to produce a thin layer of aluminium oxide which prevents it from further corrosion.This process is called anodising
10.Being malleable it is used in food packaging
aluminium is strong so it is used in auto mobile industry
11.alloys are homogenous mixture of a metal and a non metal or of two metals
the reasons for alloying are
à.it prevents the metal from rusting
b. in the case of iron,being soft in pure state, a small amount of carbon is alloyed with iron to make it strong
12.already written refer qno.1,67
13.elements differ in thier reactivity.In the reactivity series some,elements placed in the top are highly reactive and they are not found free.metals inthe middle of the series are moderatively reactive and are found as carbonate or sulphides.metal in the bottom are less reactive and are found free