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प्रश्न
An element belongs to the third period and Group IIIA (13) of the periodic table. State: the valency,
उत्तर
The valency is +3.
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संबंधित प्रश्न
Two elements ‘A’ and ‘B’ belong to the 3rd period of Modern periodic table and are in group 2 and 13, respectively. Compare their following characteristics in tabular form:-
(a) Number of electrons in their atoms
(b) Size of their atoms
(c) Their tendencies to lose electrons
(d) The formula of their oxides
(e) Their metallic character
(f) The formula of their chlorides
Write any one difference in the electronic configurations of group-1 and group-2 elements ?
What happens to the metallic character of the elements as we go down in a group of the periodic table?
Arrange the following elements in increasing order of their atomic radii:
Li, Be, F, N
Fill in the blank in the following statement:
The tendency to gain an electron ............... on moving down in a group of the periodic table.
An element which is an essential constituent of all organic compounds belongs to following group of modern periodic table:
(a) group 4
(b) group 14
(c) group 15
(d) group 16
Why sodium element of group 1 and chlorine element of group 17 both have valency 1?
An element A has atomic number 14. To which period does this element belong and how many elements are there in this period.
The electronic configuration of an element is 2, 8, 4. State it:
name and write its one physical property.
There are three elements E, F, G with atomic numbers 19, 8 and 17 respectively.
Classify the above elements as metals and non-metals.
