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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.
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उत्तर
The name of the element is Aluminium.
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संबंधित प्रश्न
The position of eight elements in the Modern Periodic Table is given below where atomic numbers of elements are given in the parenthesis.
| Period No. | ||
| 2 | Li(3) | Be(4) |
| 3 | Na(11) | Mg(12) |
| 4 | K(19) | Ca(20) |
| 5 | Rb(37) | Sr(38) |
(i) Write the electronic configuration of Ca.
(ii) Predict the number of valence electrons in Rb.
(iii) What is the number of shells in Sr?
(iv) Predict whether K is a metal or a non – metal.
(v) Which one of these elements has the largest atom in size?
(vi) Arrange Be, Ca, Mg and Rb in the increasing order of the size of their respective atoms.
Two elements ‘A’ and ‘B’ belong to the 3rd period of Modern periodic table and are in group 2 and 13, respectively. Compare their following characteristics in tabular form:-
(a) Number of electrons in their atoms
(b) Size of their atoms
(c) Their tendencies to lose electrons
(d) The formula of their oxides
(e) Their metallic character
(f) The formula of their chlorides
An element with the atomic number 19 will most likely combine chemically with the element whose atomic number is ______.
How do electronic configurations of elements change in second period of periodic table with increase in atomic numbers?
Arrange the following elements in the increasing order of their metallic character:
Mg, Ca, K, Ga
name the elements in period 1.
Arrange the following as per instruction given in the bracket.
Cs, Na, Li, K, Rb (increasing metallic character)
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 |
|
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B |
C |
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A |
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E |
Which is larger in size (i) D or E (ii) B or C
Answer the following question:
State the four blocks of the modern periodic table based on the electronic configuration of elements.
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.
