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प्रश्न
Chorine in the periodic table is surrounded by the elements with atomic number 9, 16, 18 and 35.
Which of these have physical and chemical properties resembling chlorine.
उत्तर १
An Element with atomic number 9 and 35
उत्तर २
Fluorine and chlorine have atomic numbers 9 and 35, respectively as both are halogens. They belong to the same group 17 and have seven electrons in their valence shell. The valency is 1. Both elements are non-metallic.
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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
For each of the following triads, name the element with the characteristics specified below:
| Elements | Least atomic radius | Chemically least reactive |
| (i) F, Cl, Br (ii) Li, Na, K |
.................... .................... |
.................... .................... |
Why sodium element of group 1 and chlorine element of group 17 both have valency 1?
An element X belong to 4th period and 17th group, state.
name of the element.
Name and state the following with reference to the elements of the first three periods of the periodic table.
Metalloid in Period 3.
An element A has 2 electrons in its fourth shell. State:
its valency
The electronic configuration of an element is 2, 8, 4. State it:
name and write its one physical property.
Based on the group valency of element write the molecular formula of the following compound giving justification:
Oxide of first group elements.
The similarities in the properties of a group of elements are because they have the same ______.
What is meant by a Group in the Periodic Table?
