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प्रश्न
The following questions refer to the Periodic Table.
Name the first and last element in period 2.
उत्तर
First element in period 2 is Lithium and last element is Neon.
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संबंधित प्रश्न
The atomic radii of three elements X, Y and Z of a period of the periodic table are 186 pm; 104 pm and 143 pm respectively. Giving a reason, arrange these elements in the increasing order of atomic numbers in the period.
Explain why, the properties of elements are repeated after 2, 8, 18 and 32 elements in the periodic table.
Which one of the following does not increase while moving down the group of the periodic table?
name the elements in period 1.
How many groups and periods are there in the modern periodic table?
How could the atomic radius of a noble gas be compared with the other elements in a period?
Choose the most appropriate answer from the following list of oxides which fit the description.
An amphoteric oxide.
Arrange the following as per instruction given in the bracket.
Cl, F, Br, I (increasing electron affinity)
Formula of ion of A is A2+. Element A probably belongs to ______ group.
Give a reason for the following:
A transition from metallic to non-metallic elements is seen on moving from left to right in a period of the periodic table.
