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प्रश्न
Write a scientific reason.
Atomic radius goes on increasing down a group.
Give scientific reasons:
Atomic radius goes on increasing down the ‘group’.
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उत्तर
- Atomic radius increases as we move from top to bottom in a group because a new shell of electrons is added to the atoms at every step.
- The number of electron shells increases gradually, due to which the size of the atoms increases.
- As the size of the atoms increases, it leads to an increase in the atomic radius.
- The distance between the nucleus and the outermost electrons increases, so the attractive force of the nucleus decreases.
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संबंधित प्रश्न
What do you understand by atomic size? State its unit?
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Write the name and symbol of the element from the description.
The atom having the smallest size.
Write the name and symbol of the element from the description.
The noble gas with the smallest atomic radius.
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Size of the atoms ______ from left to right across a period and ______ on descending in a group of normal elements.
Atomic radius is expressed in the unit _______.
Nanometer unit is used to measure atomic radius.
Moving from left to right, the size of the atom decreases.
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| Element | K | Na | Rb | Cs | Li |
| Atomic radius (pm) | 231 | 186 | 244 | 262 | 151 |
An element X has mass number 40 and contains 21 neutrons in its atom. To which group of the Periodic Table does it belong?
Which of the following is the correct order of atomic size?
The diagram below shows part of the periodic table.
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Cl−, Cl
Explain your choice.
Arrange the following in order of increasing radii:
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Explain your choice.
Which one of the following has the largest atomic radius?
Which one has the largest size?
