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In theModernPeriodicTableCalciumelement( atomic numbernumber20 ) issurrounded byelementwithatomicnumber12, 19 , 21 and38 . Whichof thesehas physicaland chemicalpropertiesresembling calcium? |
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Answer» Solution :An elementin the periodictable WHICHIS surrounded byfourotherelementscan beregarded as thecentralelementof one horizontalrow( period )and onevarticalcolumngroup ) . The threeelementof the horizontal row haveconsecutive atomicnumbersand hencelie in thesameperiod. On THEOTHER handthe threeelements ofthe VERTICAL columndo nothave consecutive atomicnumbersadn hencelie in thesame group. For examplethe elementcalciumwith atomicnumber20 issurroundedby fourelementwith atomicnumber 12, 19 , 21and 38.Thus theatomicnumber20 issurroundedwhichlie in thesame groupare 12, 20 and38. Thereforethe physicaland chemicalproperties ofcalcium resemble withthoseof theelements havingatomicnumbers12 and 38. |
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