What is meant by ‘group’ in the modem periodic table ? How do the following change on moving from top to bottom in a group ?
(i) Number of valence electrons
(ii) Number of occupied shells
(iii) Size of atoms
(iv) Metallic character of elements
(v) Effective nuclear charge experienced bycvalence electrons.
The vertical column of elements in the periodic table is called a group.
(i) Remains the same
(ii) Increases
(iii) Increases
(iv) Increases
(v) Decreases