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प्रश्न
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 |
|
|
B |
C |
|
|
A |
|
|
E |
State which is most reactive (i) metal (ii) non-metal
उत्तर
Most reactive
(i) Metals: Alkali metals (Group I); Caesium
(ii) Non-metals: Halogens (Group 17); Fluorine
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संबंधित प्रश्न
In the following set of elements, one element does not belong to the set. Select this element and state why it does not belong:
Oxygen, Nitrogen, Carbon, Chlorine, Fluorine
Nitrogen (atomic number 7) and phosphorus (atomic number 15) belong to group 15 of the periodic table. Write the electronic configuration of these two elements. Which of these will be more electronegative? Why?
The element which has the maximum number of valence electrons is:
(a) Na
(b) P
(c) Si
(d) A
Name the element in period 3 which does not form oxide.
Name the element of lower nuclear charge out of Be and Mg.
How many groups and periods are there in the modern periodic table?
Explain, the statement 'In each period, the atomic radii gradually decrease with increase in atomic number'. Give one example to justify your answer.
What is meant by a group in the periodic table?
How many elements are there in period 2?
The electronic configuration of an element is 2, 8, 4. State it:
name and write its one physical property.
