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प्रश्न
An element A has 2 electrons in its fourth shell. State:
position in the periodic table
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उत्तर
Position in the periodic table is group 2 period 4
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संबंधित प्रश्न
Write any one difference in the electronic configurations of group-1 and group-2 elements ?
Fill in the blank in the following statement:
On moving form right to left in the second period, the number of valency electrons ...............
Why do elements in the same group show similar properties but the elements in different groups show different properties?
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
Fill in the blank:
on moving from right to left in the second period, the number of valence electrons……….
In the following table, the positions of six elements A, B, C, D, E and F are given as they are in the Modern Periodic Table :
 |
1 | 2 | 3-12 | 13 | 14 | 15 | 16 | 17 | 18 |
| 2 | A | B | C | D | |||||
| 3 | E | F |
On the basis of the above table, answer the following questions :
(i) Name the element which forms only covalent compounds.
(ii) Name the element which is a metal with valency three.
(iii) Name the element which is a non-metal with valency three.
(iv) Out of B and C, whose atomic radius is bigger and why ?
(v) Write the common name for the family to which the elements D and F belong.
Select the correct answer
Most reactive character among the elements given below is found in
What is meant by a group in the periodic table?
Moving left to right in the second period, the number of valence electrons _____.
An element A has 2 electrons in its fourth shell. State:
its valency
