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प्रश्न
What is the number of elements in the 1st period?
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उत्तर
There are two elements in the first period.
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संबंधित प्रश्न
What is the number of valence electrons in the atoms of first elements in a period?
State how the valency of elements varies in a period of the periodic table?
The atomic numbers of the three elements X, Y and Z are 2, 6 and 10 respectively.
(i) Which two elements belong to the same group?
(ii) Which two elements belong to the same period?
Give reasons for your choice.
Give the symbol and valency of the following element and radical.
Bisulphite
State the number of elements in Period 2 of the Periodic Table.
Distinguish between:
s-block - p-block
The longest period of the Modern Periodic Table is period.
Which one of the following elements exhibit maximum number of valence electrons?
Arrange the following elements in the increasing order of their metallic character
| Mg, | Ca, | K, | Ge, | Ga |
Choose an element from period 3 of modern periodic table that matches the description given below in instance. Give a reason for your choice.
It has variable valency and is a member of the Oxygen family (group 16).
