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प्रश्न
State the following:
The group to which the element with an electronic configuration of 2, 8, 2 belongs.
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उत्तर
Element [2, 8, 2] belongs to group 2 or [II – A]
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संबंधित प्रश्न
Given below are some elements of the modern periodic table. Atomic number of the element is given in parentheses.
A(4), B(9), C(14), D(19), E(20)
(a) Select the element that has one electron in the outermost shell. Also, write the electronic configuration of this element.
(b) Which two elements amongst these belong to the same group? Give reasons for your answer.
(c) Which two elements amongst these belong to the same period? Which one of the two has bigger atomic radius?
How many groups and periods are there in the modern periodic table?
Define the term : Atomic size
Arrange the following elements in increasing order of their atomic radii:
Li, Be, F, N
Fill in the blank in the following statement:
In going across a period (right to left) in periodic table, the atomic size of the atom ...............
How does the size of atoms (atomic size) generally vary in going from left to right in a period of the periodic table? Why does it vary this way?
An element X belong to 3rd periods and group II of the periodic table state:
the valency,
name the elements in period 1.
How do you calculate the possible valency of an element from the electronic configuration of its atoms?
The electronic configuration of an element is 2, 8, 4. State it:
group and period in the Modern Periodic Table.
