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प्रश्न
Write an explanation.
Atomic radius
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उत्तर
Atomic radius is the distance from an atom’s nucleus to its outermost electron shell and is used to represent the size of an atom; it is usually given in picometres. Because electrons form a diffuse cloud, atomic radius is an approximate measure rather than a fixed boundary. Across a period the atomic radius decreases as increasing nuclear charge pulls the same-shell electrons closer, while down a group the radius increases because each successive element has an extra electron shell.
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संबंधित प्रश्न
Which is greater in size Fe2+ or Fe3+?
Arrange the following in order of increasing radii:
CI- , CI
Write the name and symbol of the element from the description.
The noble gas with the smallest atomic radius.
Give scientific reasons for the following:
Atomic radius goes on decreasing while going from left to right in a period.
Fill in the blanks.
Size of the atoms ______ from left to right across a period and ______ on descending in a group of normal elements.
With reference to the variation of properties in the Periodic Table, which of the following is generally true?
Atomic size increases from left to right across a period.
The metals of Group 2 from top to bottom are Be, Mg, Ca, Sr and Ba. Which one of these elements will form ions most readily and why?
Fill in the blank by selecting the correct word from the bracket.
If an element has seven electrons in its outermost shell then it is likely to have the _____ atomic size among all the elements in the same period.
On moving from left to right in a periodic table, the size of the atom ______.
The size of an atom is indicated by its ______.
_______ is the distance between the nucleus of the atom and its outermost shell.
While going from top to bottom in a group the atomic radius ______.
Which of the following is the correct order of atomic size?
Which of the following are the characteristics of isotopes of an element?
- Isotopes of an element have same atomic masses
- Isotopes of an element have same atomic number
- Isotopes of an element show same physical properties
- Isotopes of an element show same chemical properties
Which one of the following depict the correct representation of atomic radius(r) of an atom?
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(i) |
(ii) |
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(iii) |
(iv) |
Write the formula of the product formed when the element A (atomic number 19) combines with the element B (atomic number 17). Draw its electronic dot structure. What is the nature of the bond formed?
- In below ladder symbols of elements are jumbled up. Rearrange these symbols of elements in the increasing order of their atomic number in the Periodic Table.
- Arrange them in the order of their group also.
An element with the largest atomic radius among the following is ______.
Arrange the following in order of increasing radii:
Cl−, Cl
Explain your choice.
Which one has the largest size?
