The elements in the same group have 2 points in common.

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Common valence electrons andCommon properties

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All the facets of first group (H, Li, Na, K, Rb, Cs, Fr) have actually one valence electron.In various other words, these aspects have only one electron in their outermost orbit.

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

Example #3

All the aspects of 13th group have 3 electron in that outermost orbit.
They additionally show comparable properties like good electrical conductivity, higher melting and also boiling point, similar chemical reactivity, etc.Thus every the facets of team 13 have same number of valence electrons (i.e 3) and also they have similar properties.

Example #4

All the elements of 14th group have 4 electrons in its outermost orbit. 
They kind oxides of the kind MO and MO2 (like CO, CO2, SiO2, PbO2, etc). Hence, all the aspects of team 14 have actually the same number of valence electron (i.e 4) and they have typical properties.

Example #5

All the facets of 15th group have 5 electron in that outermost orbit.
And lock have similar chemical properties.

Example #6

All the aspects of 16th group have 6 electrons in that outermost orbit.
These elements are discovered in your polyatomic state, castle have similar outer electron construction ns2 np3, and few other comparable properties.Thus, every the aspects of team 16 have the same variety of valence electrons (i.e 6) and they show usual properties.

Example #7

All the aspects of 17th group have 7 electron in that outermost orbit. 
Elements of team 17 are highly electronegative and have greater ionisation enthalpy. They react with water and type halides.Thus every the aspects of team 17 have actually the same number of valence electron (i.e 7) and they show typical properties.

Example #8

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

Exceptions

Elements of d-block and f-block have actually some exceptions. These facets do not show the same variety of outermost electrons as that of their team number.For example, third group aspects should have 3 valence electrons, but they have actually only 2 valence electrons.Similarly, fourth group aspects should have actually 4 valence electrons, however they additionally have 2 valence electrons.Even some d-block aspects have 1 electron in their outermost orbit.This is due to the fact that the d-block elements have outermost electrons in s-orbitals and also d-orbitals. (If you perform not know around orbitals, visit here)Also these d-block aspects have incomplete d-orbitals. Thus electron of both s-orbitals and also d-orbitals get involved in chemical reaction.Similarly, f-block facets have incomplete f-orbitals.And here also, the electrons of both s-orbitals and f-orbitals participate in chemical reaction.Hence d-block and f-block facets have change valency or different valence electrons other than the group number.)
Confused?? Checkout Interactive periodic table (where friend will uncover the arrangement of electrons for each element.)
Also visit: What do periods ~ above the regular table represents?

Final words

Modern regular table consists groups and periods.The vertical columns are called groups. The aspects which space in the same groups have the same variety of valence electron (i.e same number of electrons in the outermost shell).Also they possess almost comparable properties.Yes there room also few exceptions in the aspects of d-block and f-block. But in general, for the key group aspects (s-block and also p-block), the elements of same team have the exact same valence electrons and also common properties.I expect you have plainly understood what elements in the same group have in common.If girlfriend have any doubts, feel totally free to asking me in the comment below.Also permit me know, has actually this write-up helped girlfriend or not?

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