An element with Z $$=$$ $$31$$ belongs to ………block…….group and …….period of modern periodic table

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An element with Z $$=$$ $$31$$  belongs to ………block…….group and …….period of modern periodic table

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Hints to predict the position of element in the Modern periodic table :$$1)Elements$$ from Z $$=$$ $$58-71$$……Lanthanoids….$$.4f$$ series…$$.6th$$ period……$$3rd(IIIB)$$ group;$$2)Elements$$ from Z $$=$$ $$90-103$$……Actinoids….$$.5f$$ series…$$.7th$$ period……$$3rd(IIIB)$$ group;$$3)Elements$$ from Z $$=$$ $$104-118$$………..Last two digits gives group number….. $$7th$$ period;$$4)Elements$$ from Z $$=$$ $$31-57$$….subtract $$18$$ to get preceding element;$$5)Elements$$ from Z $$=$$ $$72-89$$….subtract $$32$$ to get preceding element;$$6)Elements$$ from Z $$=$$ $$104-120$$….subtract $$32$$ to get preceding element ;For $$Z=104-120$$….simplest $$Hint7)Elements$$ from Z $$=$$ $$104-120$$….subtract $$82$$ to get a lower $$member(Z$$<$$30)$$ belonging to same group;Hints $$4$$, $$5$$ and $$6$$ can be used repeatedly until an element belonging to same group with Z < $$30$$ is obtained;Elements with Z < $$30$$ with their group, period and block can be known from Electronic configuration;Ex : $$Z=113$$, $$81$$, $$49$$, $$31$$, $$13$$, $$5$$….belong to $$13th(IIIA)$$ group;(113-32)=81$$; $$(81-32)=49$$; $$(49-18)=31$$; $$(31-18)=13$$;Z $$=$$ $$13$$…..Al…$$.3s23p1$$…..$$n=3$$…$$.3rd$$ period……$$p-block$$….valence $$electrons(3)…$$.13th$$ group;Z $$=$$ $$31$$…..Ga…$$.4s24p1$$…..$$n=4$$…$$.4th$$ period……$$p-block$$….valence $$electrons(3)$$…$$.13th$$ group;Z $$=$$ $$49$$…..In…$$.5s25p1$$…..$$n=5$$…$$.5th$$ period……$$p-block$$….valence $$electrons(3)$$…$$.13th$$ group;Z $$=$$ $$81$$…..Tl…$$.6s26p1$$…..$$n=6$$…$$.6th$$ period……$$p-block$$….valence $$electrons(3)$$…$$.13th$$ group;Z $$=$$ $$113$$…..Nh…$$.7s27p1$$…..$$n=7$$…$$.7th$$ period……$$p-block$$….valence $$electrons(3)$$…$$.13th$$ group;

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