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प्रश्न
Name the period which is the shortest period of the periodic table.
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उत्तर
The shortest period is period 1 of the periodic table.
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संबंधित प्रश्न
The elements Be, Mg and Ca each having two electrons in their outermost shells are in periods 2, 3, and 4 respectively of the modern periodic table. Answer the following questions, giving justification in each case:-
(i) Write the group to which these elements belong.
(ii) Name the least reactive element.
(iii) Name the element having largest atomic radius.
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?
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
Complete the following sentences.
The properties of the elements are a periodic function of their …………… (atomic number, mass number, reative atomic mass).
Fill in the blank
Oxidising property ________from fluroine to iodine because the power to accpet electron decreases.
'In a group, the atomic radii increase with increasing period number', explain this statement and justify it with reference to group 17.
Arrange the following as per instruction given in the bracket.
Cl, F, Br, I (increasing electron affinity)
The position of elements A, B, C, D and E in the periodic table are shown below:
|
Group 1 |
Group 2 |
Group 17 |
Group 18 |
|
|
|
|
D |
|
|
B |
C |
|
|
A |
|
|
E |
Which is larger in size (i) D or E (ii) B or C
An element A has 2 electrons in its fourth shell. State:
position in the periodic table
An element A has 2 electrons in its fourth shell. State:
is it a metal or non-metal
