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प्रश्न
Write the name and symbol of the element from the description.
The noble gas with the smallest atomic radius.
उत्तर
Name: Helium
Symbol: He
Explanation:
Helium (He) is the noble gas with the smallest atomic radius. Although noble gases have complete outer electron shells and do not readily form bonds, helium has the smallest atomic size because it has only two electrons and experiences strong nuclear attraction, pulling the electrons closer to the nucleus.
संबंधित प्रश्न
What do you understand by atomic size? State its unit?
Why is the size of sodium is greater than magnesium?
Size of atom progressively becomes smaller when we move from sodium (Na) to chlorine (CI) in the third period of the periodic table?
Write the name and symbol of the element from the description.
The atom having the smallest atomic mass.
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?
Select the correct answer
Atomic radii of fluorine and neon in angstrom unit are
What happens to the atomic size of elements on moving from left to right in a period?
The following questions refer to the Periodic Table.
What happens to the atomic size of elements moving from top to bottom of a group?
Arrange the following as per the instruction given in the bracket
Na, K, Li (Increasing atomic size)
Nanometer unit is used to measure atomic radius.
Moving from left to right, the size of the atom decreases.
Write an Explanation.
Atomic radius
Write scientific reason.
In same period, boron and oxygen elements have different atomic size.
Which of the following gives the correct increasing order of the atomic radii of O, F, and N?
Which among the following elements has the largest atomic radii?
Arrange the following elements in increasing order of their atomic radii.
- Li, Be, F, N
- Cl, At, Br I
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
