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प्रश्न
Write the name and symbol of the element from the description.
The atom having the smallest atomic mass.
उत्तर
Name: Hydrogen
Symbol: H
Explanation:
Hydrogen (H) has the smallest atomic mass of 1.008 u. It is the lightest and most abundant element in the universe, playing a crucial role in chemical reactions, including combustion and acid-base reactions.
संबंधित प्रश्न
Arrange the following as per the instruction given in the brackets:
Na, K, Li (Increasing atomic size)
Give the trends in atomic size on moving down the group.
Why is the size of sodium is greater than magnesium?
Which is greater in size Fe2+ or Fe3+?
Give reason for the following:
Argon atom is bigger than chlorine atom.
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.
Among the elements of the second period, Li to Ne, pick out the element with the largest atomic size
Write scientific reason.
In same period, boron and oxygen elements have different atomic size.
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 ______
When an atom of iodine becomes an iodine ion (I–) the radius will ______
Which among the following elements has the largest atomic radii?
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
Arrange the following elements in increasing order of their atomic radii.
- Li, Be, F, N
- Cl, At, Br I
Give reason for the following:
The size of a Cl− ion is greater than the size of a Cl atom.
This question refers to the elements of the Periodic Table with atomic numbers from 3 to 18. Some of the elements are shown by letters, but the letters are not the usual symbols of the elements.
| 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 |
| A | B | C | D | E | F | G | H |
| 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 |
| I | J | K | L | M | N | O | P |
Which of these have least atomic size in period 3?
