An element x has mass number 35 and number of electrons 18. write atomic number and electronic configuration of x. also write group number, period number and valency of x.
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given ;
mass no. of x element = 35
no. of electrons = 18
then its atomic no. will ; 35-18=17
electronic configuration =2,8,7
.: group no. =17
valency= 8-7=1
period no.=1
mass no. of x element = 35
no. of electrons = 18
then its atomic no. will ; 35-18=17
electronic configuration =2,8,7
.: group no. =17
valency= 8-7=1
period no.=1
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