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प्रश्न
Select the correct answer from the options given below.
It is a period having elements from atomic no. 11 to 18.
विकल्प
period – 1
period – 2
period – 3
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उत्तर
period – 3
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संबंधित प्रश्न
Elements in the same group show the same valency. Give scientific reason.
Which element has a total of two shells, with three electrons in its valence shell?
Fill in the blank in the following statement:
The tendency to gain an electron ............... on moving down in a group of the periodic table.
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 | Ra |
What happens to the size of atoms?
The elements A, B, C, D and E have atomic numbers 9, 11, 17, 12 and 13 respectively. The pair of elements which belongs to the same group of the periodic table is:
(a) A and B
(b) B and D
(c) A and C
(d) D and E
Which of the following set of elements is written correctly in the order of their increasing metallic character?
(a) Mg, Al, Si
(b) C, O, N
(c) Na, Li, K
(d) Be, Mg, Ca
Fill in the blank
Oxidising property ________from fluroine to iodine because the power to accpet electron decreases.
How many elements are there in period 2?
Arrange the following as per instruction given in the bracket.
Mg, Cl, Na, S, Si (decreasing order of atomic size)
Formula of ion of A is A2+. Element A probably belongs to ______ group.
