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प्रश्न
The position of elements A, B, C, D and E in the periodic table are shown below:
|
Group 1 |
Group 2 |
Group 17 |
Group 18 |
|
|
|
|
D |
|
|
B |
C |
|
|
A |
|
|
E |
Which is larger in size (i) D or E (ii) B or C
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उत्तर
E
B
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संबंधित प्रश्न
Define the term : Valency
What happens to the metallic character of the elements as we move from left to right in a period of the periodic table?
Which of the following is the valence shell for the elements of second period of the modern periodic table?
(a) M shell
(b) K shell
(c) L shell
(d) N shell
K, Pb, Ca, Zn (In the increasing order of the reactivity)
How many groups and periods are there in the modern periodic table?
What is the common feature of electronic configurations of the elements at the end of period 2 and period 3?
The elements of one short period of the periodic table are given below in order from left to right:
| Li | Be | B | C | O | F | Ne |
Place the three elements fluorine, beryllium and nitrogen in the order of increasing electronegativity.
Name and state the following with reference to the elements of the first three periods of the periodic table.
Alkaline earth metal in period 3.
Based on the group valency of element write the molecular formula of the following compound giving justification:
Oxide of first group elements.
Name or state following with reference to the elements of the first three periods of the periodic table.
A metalloid in period 2 and in period 3.
