Three elements X,Y,Z have atomic number 7,8,9 respectively I) State their position ( Group No. and Period No.) in Modern Periodic Tableii) arrange the elements in decreasing order of their atomic radii.iii) write the formula of compound formed when X combines with z

Three elements X,Y,Z have atomic number 7,8,9 respectively I) State

1.	Three elements X,Y,Z have atomic number 7,8,9 respectively I) State their position ( Group No. and Period No.) in Modern Periodic Tableii) arrange the elements in decreasing order of their atomic radii.iii) write the formula of compound formed when X combines with z
Answer» i, GROUP no.7 PERIOD. 2 group no.8,period 2 group no.9,period 2