Metals and Non-Metals in Periodic Classification
Metals and Non-Metals in Periodic Classification
Metals and Non Metals in Periodic Classification:
As there are basically three types of elements. They are :
Metals:
These are electropositive elements i.e. they can lose electrons easily. They posses lusture, ductility, malleability and good conductor of heat and electricity.They have low ionization energy means they can lose electrons with less requirement of energy and hence are metallic in nature.
Non-Metals:
These are electronegative elements. They are non lustrous,brittle and poor conductor of heat and electricity. They have high ionization energy and hence have tendency to gain electrons rather than losing them.
Metalloids:
These have property of both metals and non-metals. They are used as semiconductors in industries. Example Silicon, Germanium.
Trends in metallic and non- metallic character :
From moving top to bottom of the periodic table their occur increase in the size elements. Due to this increase in the size there is increase in the distance between nucleus and electrons and hence elements can lose electrons easily and therefore metallic character increases while moving from top to the bottom.
From right to left due to decrease in the size of the elements tendency to lose electrons decreases and hence metallic character decreases.
Elements to the left of the periodic table line are metals. Metals include s block elements also known as earth metals,d block also known as transition elements and elements like Al, Ga,In,Tl,Sn, Pb, Bi, Po of the p block of periodic table.Elements just right to the line are called Metalloids. The elements B,Si,Ge,As,Sb,Te are metalloids present in the p block of the periodic table . Elements at the extreme right of periodic table includes non metals. Non metals are present in the p block of the periodic table which is consist of 13,14,15,16,17,18 groups . Group 17 elements are known as Halogens and group 18 elements are known as noble gases as these elements have complete octet and hence non reactive.
Which of the following element is used as semiconductors ? | |||
| Right Option : B | |||
| View Explanation | |||
Which of the following is electropositive in nature? | |||
| Right Option : B | |||
| View Explanation | |||
Which of the following are electronegative in nature ? | |||
| Right Option : C | |||
| View Explanation | |||
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