Two elements X and Y belong to groups 1 and 2 respectively in the same period. Compare them with respect to (a) the number of electrons in the outermost shell, (b) the number of valence electrons , (c) metallic character, (d) size of the atoms and ( e) formulae of the oxdies , hydrides and chlorides.

Two elements X and Y belong to group 1 and 2 respectively in the same period. Compare them with respect to: (a) the number of valence electrons (b) valency (c) metallic character (d) size of the atoms (e) formulae of their oxides and chlorides.

Two elements X and Y belong to group 1 and 2 respectively in the same period of periodic table. Compare these elements with respect to (i) number of electrons in their outermost orbits (ii) their valencies (iii) metallic character (iv) their atomic size (v) formula of their chlorides (vi) formula of their sulphates

Two elements 'P' and 'Q' belong to the same period of the modern periodic table and are in Group-1 and Group-2 respectively. Compare their following characteristics in tabular from: (a) The number of electrons in their atoms (b) The sizes of their atoms (c) Their metallic characters (d) Their tendencies to lose electrons (e)The formula of their oxides (f) The formula of their chlorides

Two elements M and N belong to group I and II respectively and are in the same period of the periodic table. How do following properties of M and N vary ? (a) Size of their atoms (b) Their metallic character (c) Their valencies in forming oxides (d) Formulae of their chlorides