Arrange the following metals according to the increasing order
of their reactivity.
K, Pb .H , Na ,Cu,Hg, Ca ,Mg, Al, Ag, Zn ,Fe, Au,
Answers
According to the Reactivity series:-
K>Na>Ca>Mg>Al>Zn>Fe>Sn>Pb>Hg>Cu>Ag>Au
Therefore, according to question, increasing order of their reactivity is:
Ag<Cu<Hg<Zn<Al<Ca<K.
Hope this helps you.
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Answer:
★ Activity Series : A list of metals arranged in decreasing order of reactivity is known as the activity series of metals.
Re activity Series :
k , Na, Ca, Mg , Al, Zn, Fe, Pb, [H], Cu, Hg, Ag, Au
Now, In question it is said that we have to arrange this in increasing order.
So, In increasing order it will be :
Au ⠀⠀⠀⠀⠀Gold⠀⠀⠀⠀⠀
Ag ⠀⠀⠀⠀⠀Silver
Hg⠀⠀⠀⠀⠀Mercury
Cu⠀⠀⠀⠀⠀Copper
[H]⠀⠀⠀⠀⠀Hydrogen
Pb⠀⠀⠀⠀⠀Lead
Fe⠀⠀⠀⠀⠀Iron
Zn⠀⠀⠀⠀⠀Zinc
Al⠀⠀⠀⠀⠀Aluminium
Mg⠀⠀⠀⠀Magnesium
Ca⠀⠀⠀⠀Calcium
Na⠀⠀⠀⠀Sodium
k⠀⠀⠀⠀⠀Potassium⠀⠀⠀ ⠀⠀⠀⠀⠀⠀⠀⠀
* Potassium is most reactive whereas gold is the least reactive metal in the reactivity series *
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Some more to know :
Elements can be classified as metals or non - metals on the basis of their properties.
are the substances which can form positively charged ions by the loss of electrons.
Physical Properties of Metals
All metals are solids at room temperature, except mercury which is a liquid.
They are generally hard , except sodium and potassium as they are so soft that they can be easily cut with a knife.
They have lustre, i.e, they have a shining surface and can be polished.
They are malleable, i.e, they can be hammered into thin sheets and bent into shapes without breaking.
They are ductile also, It means that they can be drawn out to make very thin wires. Gold and silver are the most malleable and ductile metals.
They have have high melting and boiling points.
They are sonorous. It means they make ringing noise when struck.
are the substances which can form negatively charged ions by the gain of electrons.
Physical Properties of Non - Metals
Non metals are generally soft.
Exception : Diamond, which is the hardest known natural substance found on earth.
Non metals are neither malleable nor ductile , they are brittle.
They do not have lustre.
These are generally bad conductor of heat and electricity.
Non - metals are not sonorous.