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प्रश्न
_______ is the distance between the nucleus of the atom and its outermost shell.
विकल्प
Atomic radius
Atomic diameter
atomic mass
atomic size
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उत्तर
Atomic radius is the distance between the nucleus of the atom and its outermost shell.
Explanation:
The atomic radius is defined as the distance between the center of the nucleus and the outermost shell containing electrons in an atom. It is the standard measure used to describe the size of an atom.
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संबंधित प्रश्न
Which is greater in size an atom or an anion?
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Study the radius of the element given below and answer the following questions.
| elements | K | Na | Rb | Cs | Li |
| Atomic radius (pm) | 231 | 186 | 244 | 262 | 151 |
a) Which of the above elements have the smallest atom?
b) In which group of the modern periodic table the above element are belongs?
c) What is the periodic trend observed in the variation of atomic radii down a group?
The changes in the properties of elements on moving from left to right across a period of the Periodic Table. For the property, choose the correct answer.
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Right or wrong sentence.
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Write an explanation.
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- Isotopes of an element have same atomic masses
- Isotopes of an element have same atomic number
- Isotopes of an element show same physical properties
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- Electropositive nature of the element(s) increases down the group and decreases across the period
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On the basis of the above trends of the Periodic Table, answer the following about the elements with atomic numbers 3 to 9.
- Name the most electropositive element among them
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Arrange the following in order of increasing radii:
Cl−, Cl
Explain your choice.
Give reason for the following:
The size of a Cl− ion is greater than the size of a Cl atom.
