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प्रश्न
Consider the following elements: Be, Li, Na, Ca, K. Name the elements of (a) same group (b) same period.
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उत्तर
|
Element |
At. No. |
Electronic distribution |
|
Be |
4 |
2, 2 |
|
Li |
3 |
2, 1 |
|
Na |
11 |
2, 8, 1 |
|
Ca |
20 |
2, 8, 8, 2 |
|
K |
19 |
2, 8, 8, 1 |
Same IA group (Li, Na, K) and IIA group (Be, Ca)
In the second period (Be, Li) and in the fourth period (K, Ca).
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संबंधित प्रश्न
What is meant in the periodic table by a group?
How do atomic structures (electron arrangements) change in a period with an increase in atomic numbers moving left to right?
What happens to the number of valence electrons in atoms of elements as we go down a group of the periodic table?
Name and state the following with reference to the elements of the first three periods of the periodic table.
Noble gas having electronic configuration: 2, 8, 8.
Name the gas used in:
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Give reason:
Alkali metals are kept in an inert solvent.
Give reason:
Inert gases do not form compounds.
Write a short note on the following type of element –
noble gases
Give a reason for the following:
Group 1 [I – A] elements are called alkali metals.
State the following:
The group which contains highly reactive electronegative non-metals including chlorine.
