Advertisements
Advertisements
प्रश्न
What is meant by 'group' in the modern 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 element
(v) Effective nuclear charge experienced by valence electrons
उत्तर
Vertical columns of the periodic table are known as groups.
(i) The number of valence electrons remains constant when we move down the group.
(ii) The number of occupied shells increases down the group.
(iii) The size of atoms increases down the group.
(iv) The metallic character of elements increases down the group.
(v) The effective nuclear charge decreases down the group.
APPEARS IN
संबंधित प्रश्न
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 form:-
(a) The number of electrons in their atoms
(b) The sizes of their atoms
(c) Their metallic character
(d) Their tendencies to lose electrons
(e) The formula of their oxides
(f) The formula of their chlorides
Which element has the electronic configuration 2, 8, 2?
Name the element which is in seventeenth group and second period.
Given alongside is a part of the periodic table. As we move vertically downward from Li to Fr:
| Li | Be |
| Na | |
| K | |
| Rb | |
| Cs | |
| Fr | Ra |
What happens to their metallic character?
Periodicity is observed due to the similar ______.
Arrange the following in order of increasing radii:
N, O, P
Name and state the following with reference to the elements of the first three periods of the periodic table.
Non-metallic elements present in Period 3 of Groups 15 and 16.
Going across a period left to right, atomic size _____.
Based on the group valency of element write the molecular formula of the following compound giving justification:
Halide of the elements of group thirteen
Name the elements in Period 1.
