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प्रश्न
Two elements P and Q belong to the same period of the modern periodic table and are in group 1 and group 2, respectively. Compare the following characteristics in the tabular form.
- Number of electrons in their atoms
- Their tendency to lose electrons
- Their metallic characters
- Formation of their oxides
- Formulae of their chlorides
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उत्तर
As elements P and Q belong to the same period of the modern periodic table and are in group 1 and group 2, they belong to alkali metals and alkaline earth metals, respectively.
| Characteristic |
P |
Q |
|
(a) Number of electrons in their atoms |
Valence electron = 1 |
Valence electrons = 2 |
|
(b) Their tendency to lose electrons |
Can easily lose electrons |
They will lose electrons easily but not as easily as alkali metals can. |
|
(c) Their metallic characters |
P is more metallic |
Q is less metallic than P |
|
(d) Formation of their oxides |
React rapidly with oxygen in the air 4Na + O2 → 2Na2O |
Less reactive than alkali metals |
|
(e) Formulae of their chlorides |
NaCl, KCl, CsCl |
MgCl2, CaCl2, BaCl2 |
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संबंधित प्रश्न
How does the metallic character of elements in Modern Periodic Table vary on moving from left to right in a period, and (ii) down a group?Give reason to justify your answer.
Explain why all the elements of a group have similar chemical properties.
State how the valency of elements varies in a period of the periodic table?
What is a group in the periodic table?
An element E has following electronic configuration:
|
K |
L |
M |
|
2 |
8 |
6 |
(a) To which group of the periodic table does element E belong?
(b) To which period of the periodic table does element E belong?
(c) State the number of valence electrons present in element E.
(d) State the valency of the element E.
Answer the following question.
How it can be proved that the basic structure of the Modern Periodic Table is based on the electronic configuration of atoms of different elements?
Find the odd one out and give its explanation.
In the modern periodic table, elements are arranged according to their ______
Which of the following statements about the Modern Periodic Table is correct:
Choose an element from period 3 of modern periodic table that matches the description given below in instance. Give a reason for your choice.
It has variable valency and is a member of the Oxygen family (group 16).
