The facets in the same team have 2 points in common.

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Common valence electron andCommon properties

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All the facets of 1st group (H, Li, Na, K, Rb, Cs, Fr) have actually one valence electron.In various other words, these facets have just one electron in your outermost orbit.

Also, the elements lying in the same group have usual properties.For example, Group 1 aspects (lithium, sodium, potassium, rubidium, cesium and francium) have comparable physical properties like, metallic luster, softness, etc.Also lock have comparable chemical properties. For example, all the alkali steels (group 1 elements) are highly reactive to water.
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These room the group 2 elements All the team 2 aspects have 2 valence electron (or 2 electrons in outermost orbit).
Plus, these group 2 elements also show comparable physical and also chemical properties.Thus all the elements of group 2 have actually same number of valence electrons (i.e 2) and also they have typical properties.Similarly,

Example #3

All the facets of 13th team have 3 electrons in its outermost orbit.
They also show similar properties like great electrical conductivity, greater melting and also boiling point, comparable chemical reactivity, etc.Thus all the aspects of group 13 have actually same variety of valence electron (i.e 3) and also they have similar properties.

Example #4

All the aspects of 14th group have 4 electron in that outermost orbit. 
They type oxides of the type MO and also MO2 (like CO, CO2, SiO2, PbO2, etc). Hence, every the aspects of team 14 have the same number of valence electrons (i.e 4) and also they have usual properties.

Example #5

All the elements of 15th group have 5 electrons in the outermost orbit.
And lock have comparable chemical properties.

Example #6

All the aspects of 16th group have 6 electrons in that is outermost orbit.
These aspects are found in your polyatomic state, lock have comparable outer electron construction ns2 np3, and couple of other similar properties.Thus, all the aspects of team 16 have actually the same number of valence electron (i.e 6) and they show common properties.

Example #7

All the elements of 17th team have 7 electron in the outermost orbit. 
Elements of group 17 are very electronegative and also have greater ionisation enthalpy. They react through water and type halides.Thus every the facets of team 17 have the same number of valence electrons (i.e 7) and they show usual properties.

Example #8

All the aspects of 18th team have 8 electrons in the outermost orbit. 
All the elements of the 18th group have totally filled valence electrons and they room chemically inert. These facets are likewise known as Noble gases.Hence they have actually the same variety of valence electron plus castle show similar properties.(Note: 13th group elements have 3 electron in external shell, no 13.14th group elements have 4 electron in external shell, not 14.15th group facets have 5 electrons in external shell, not 15.16th group facets have 6 electron in external shell, not 16.17th group elements have 7 electrons in outer shell, no 17.18th group facets have 8 electron in outer shell, not 18.)

Exceptions

Elements the d-block and also f-block have some exceptions. These elements do not present the same number of outermost electrons as that the their group number.For example, third group facets should have actually 3 valence electrons, however they have only 2 valence electrons.Similarly, fourth group facets should have actually 4 valence electrons, but they likewise have 2 valence electrons.Even part d-block facets have 1 electron in their outermost orbit.This is due to the fact that the d-block elements have outermost electron in s-orbitals and d-orbitals. (If you execute not know about orbitals, visit here)Also this d-block facets have incomplete d-orbitals. Thus electrons of both s-orbitals and also d-orbitals get involved in chemical reaction.Similarly, f-block aspects have incomplete f-orbitals.And below also, the electron of both s-orbitals and also f-orbitals get involved in chemical reaction.Hence d-block and also f-block aspects have change valency or various valence electrons other than the team number.)
Confused?? Checkout Interactive regular table (where you will discover the arrangement of electrons because that each element.)
Also visit: What do periods top top the periodic table represents?

Final words

Modern periodic table covers groups and periods.The upright columns are dubbed groups. The aspects which are in the same groups have the same number of valence electrons (i.e same number of electrons in the outermost shell).Also they possess almost similar properties.Yes there are also few exceptions in the facets of d-block and f-block. But in general, for the main group facets (s-block and also p-block), the facets of same group have the same valence electrons and also common properties.I expect you have clearly understood what facets in the same group have in common.If you have any doubts, feel cost-free to ask me in the comments below.Also allow me know, has this post helped girlfriend or not?

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