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प्रश्न
Moving left to right in the second period, the number of valence electrons _____.
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उत्तर
Moving left to right in the second period, the number of valence electrons increases from 1 to 8.
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संबंधित प्रश्न
The atomic numbers of three elements A, B and C are 12, 18 and 20 respectively. State, giving reason, which two elements will show similar properties.
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Calcium, Magnesium, Sodium, Beryllium
What happens to the metallic character of the elements as we move from left to right in a period of the periodic table?
In terms of electronic configurations, explain the variation in the size of the atoms of the elements belonging to the same period and same group ?
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:
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(c) A and C
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Arrange the following as per instruction given in the bracket.
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Valency of elements in Group 14 and 15.
An element A has 2 electrons in its fourth shell. State:
is it a metal or non-metal
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.
