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प्रश्न
An element belongs to the third period and Group IIIA (13) of the periodic table. State: the name of the element.
उत्तर
The name of the element is Aluminium.
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संबंधित प्रश्न
Elements in the same group show the same valency. Give scientific reason.
In the following set of element, one element does not belong to the set. Select this element and state why it does not belong:
Calcium, Magnesium, Sodium, Beryllium
The elements A, B, C, D and E have atomic numbers 9, 11, 17, 12 and 13 respectively. The pair of elements which belongs to the same group of the periodic table is:
(a) A and B
(b) B and D
(c) A and C
(d) D and E
In each of the following pair, choose the atom having the bigger size:
(a) Mg (At. No.12) or Cl (At. No.17)
Correct the statements.
Elements in the same periods have equal valency.
Name two elements you would expect to show chemical reactions similar to calcium. What is the basis of your choice?
Fill in the blank:
on moving from right to left in the second period, the number of valence electrons……….
Fill in the blank
There are ______ groups and ______ periods in the modern form of periodic table.
Select the correct answer
Most reactive character among the elements given below is found in
Choose the word or phrase from the bracket which correctly complete each of the following statement:
Metals are good ................. (oxidising agents/reducing agents) because they are electron ............. (acceptors/donors).
