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प्रश्न
Name or state following with reference to the element of the first three periods of the periodic table.
A metal in period 3 having valency 3.
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उत्तर
Metal in period 3 is A1 [Aluminium]
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संबंधित प्रश्न
Write the electronic configuration of K and Ne.
Write the atomic numbers of two elements 'X' and 'Y' having electronic configuration 2, 8, 2 and 2, 8, 6 respectively.
Which element has the electronic configuration 2, 8, 2?
How does the valency of elements change of moving from left to right in the third period of the periodic table?
The electronic configuration of the atom of an element X is 2, 8, 4. In modern periodic table, the element X is places in :
(a) 2nd group
(b) 4th group
(c) 14th group
(d) 8th group
Which one of the following does not increase while moving down the group of the periodic table?
Why fluorine has higher E.N. than chorine?
Name the element of lower nuclear charge out of Be and Mg.
Study the extract of the Periodic Table given below and answer the questions that follow. Give the alphabet corresponding to the element in question. DO NOT repeat an element. 
Which is an inert gas?
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 |
State which is most reactive (i) metal (ii) non-metal
