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प्रश्न
Arrange the following elements in increasing order of their atomic radii:
Li, Be, F, N
उत्तर
The elements in the increasing order of their atomic radii are as follows:
F<N<Be<Li.
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संबंधित प्रश्न
Fill in the blank:
The formulae of chloride of metal M is MCl2. The metal M belongs to ……………. group.
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?
On moving from left to right in a period of the periodic table, the atomic number of elements increases. What happens to the size of atoms of elements on moving from left to right in a period?
(a) increases
(b) decreases
(c) remain the same
(d) first increases then decreases
What do you understand by periodicity?
Name the element in period 3 which does not form oxide.
Atomic number of metal ‚A‛ is 11, while atomic number of metal ‚B‛ is 20. Which of them will be more reactive? Write the chemical reaction of dilute HCl with metal ‚A‛.
'In a group, the atomic radii increase with increasing period number', explain this statement and justify it with reference to group 17.
State the number of elements in period 1, period 2 and period 3 of the periodic table.
An element belongs to the third period and Group IIIA (13) of the periodic table. State: if it is a metal or non-metal?
Name or state following with reference to the element of the first three periods of the periodic table.
The non-metallic element present in period 3 other than sulphur and chlorine.
