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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
Arrange the following as per the instruction given in the brackets:
Na, K, Li (Increasing atomic size)
Arrange the elements of second and third periods in increasing order of their atomic size (excluding noble gases).
Which is greater in size Fe2+ or Fe3+?
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 atom having the smallest atomic mass.
Write the name and symbol of the element from the description.
The noble gas with the smallest atomic radius.
Arrange the following in increasing order of property indicated
I, I+, I- (atomic size)
What happens to the atomic size of elements on moving from left to right in a period?
Arrange the following as per the instruction given in the bracket.
Mg, Cl, Na, S, Si (increasing order of atomic size)
The size of an atom is indicated by its ______.
_______ is the distance between the nucleus of the atom and its outermost shell.
Right or wrong sentence.
The size of an atom depends on the number of valence electrons.
Write information about the given atomic numbers in the table.
| Atomic Number | Electronic configuration | Group | Period | Element |
| 10 | ||||
| 20 | ||||
| 7 |
Carbon belongs to the second period and Group 14. Silicon belongs to the third period and Group 14. If the atomic number of carbon is 6, the atomic number of silicon is ______
Which of the following is the correct order of atomic size?
Which of the following gives the correct increasing order of the atomic radii of O, F, and N?
When an atom of iodine becomes an iodine ion (I–) the radius will ______
Atomic number of a few elements are given below
10, 20, 7, 14
- Identify the elements
- Identify the Group number of these elements in the Periodic Table
- Identify the Periods of these elements in the Periodic Table
- What would be the electronic configuration for each of these elements?
- Determine the valency of these elements
The diagram below shows part of the periodic table.
- Which elements would react together to form covalent compounds?
- Between the two elements W and Z, which will have a bigger atomic radius? Why?
