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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?
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Name and state the following with reference to the elements of the first three periods of the periodic table.
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Name and state the following with reference to the elements of the first three periods of the periodic table.
Group whose elements have zero valencies.
Name the method by which alkali metals can be extracted.
Give reason:
Alkali and alkaline earth metal compounds usually form electrovalent compounds.
Write a short note on the following type of element –
halogens
‘The periodic table contains elements methodically grouped together’.
Select the correct answer from the options given below.
The most reactive halogen from group 17.
Give a reason for the following:
Group 1 [I – A] elements are called alkali metals.
