Question

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,​

Answer 1

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.

Have a great day!!

Answer 2

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⠀⠀⠀⠀⠀$\bf {(Least \: Reative)}$

Ag ⠀⠀⠀⠀⠀Silver

Hg⠀⠀⠀⠀⠀Mercury

Cu⠀⠀⠀⠀⠀Copper

[H]⠀⠀⠀⠀⠀Hydrogen

Pb⠀⠀⠀⠀⠀Lead

Fe⠀⠀⠀⠀⠀Iron

Zn⠀⠀⠀⠀⠀Zinc

Al⠀⠀⠀⠀⠀Aluminium

Mg⠀⠀⠀⠀Magnesium

Ca⠀⠀⠀⠀Calcium

Na⠀⠀⠀⠀Sodium

k⠀⠀⠀⠀⠀Potassium⠀⠀⠀$\bf {(Most \: Reative)}$ ⠀⠀⠀⠀⠀⠀⠀⠀

* 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.

$\dag \: \: {\large{\boxed{\bf{\purple{Metals \: :}}}}}$

$\sf {\blue{Metals}}$ are the substances which can form positively charged ions by the loss of electrons.

Physical Properties of Metals

$\bullet \: \:$ All metals are solids at room temperature, except mercury which is a liquid.

$\bullet \: \:$ They are generally hard , except sodium and potassium as they are so soft that they can be easily cut with a knife.

$\bullet \: \:$ They have lustre, i.e, they have a shining surface and can be polished.

$\bullet \: \:$ They are malleable, i.e, they can be hammered into thin sheets and bent into shapes without breaking.

$\bullet \: \:$ 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.

$\bullet \: \:$ They have have high melting and boiling points.

$\bullet \: \:$ They are sonorous. It means they make ringing noise when struck.

$\dag \: \: {\large{\boxed{\bf{\purple{Non \: - \: Metals \: :}}}}}$

$\sf {\blue{ Non \: - \: Metals}}$ are the substances which can form negatively charged ions by the gain of electrons.

Physical Properties of Non - Metals

$\bullet \: \:$ Non metals are generally soft.

$\bullet \: \:$ Exception : Diamond, which is the hardest known natural substance found on earth.

$\bullet \: \:$ Non metals are neither malleable nor ductile , they are brittle.

$\bullet \: \:$ They do not have lustre.

$\bullet \: \:$ These are generally bad conductor of heat and electricity.

$\bullet \: \:$ Non - metals are not sonorous.