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प्रश्न
Explain the significance of the symbol H.
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उत्तर
Significance of symbol H
- The symbol H refers to the element hydrogen.
- The symbol H refers to one atom of hydrogen.
- The symbol H refers to one mole of hydrogen i.e. 6.022 × 1023 atoms.
- The symbol H refers to 1 gram atomic mass of hydrogen.
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संबंधित प्रश्न
The symbol of a metal element which is used in making thermometers is :
What do the following symbol stand for?
2H
Give two examples of the following:
Liquid + Liquid mixture:
Match the non-metallic elements – with their correct symbols. Non-metallic elements are:
| Non-Metallic elements | Symbol |
| (a) Carbon | (1) O |
| (b) Chlorine | (2) I |
| (c) Oxygen | (3) Si |
| (d) Phosphorus | (4) C |
| (e) Hydrogen | (5) Cl |
| (f) Nitrogen | (6) P |
| (g) Iodine | (7) F |
| (h) Bromine | (8) H |
| (i) Fluorine | (9) S |
| (j) Silicon | (10) Br |
| (k) Sulphur | (11) N |
Give the symbol and the number of atoms of the following elements present in carbon dioxide.
Write the radical of the following valency:
Sodium
Select the correct answer to the statement given below:
An element present in the earth’s crust, atmosphere and the human body.
State whether the following ion or radical given below of a non-metallic element exhibits valency: 1–, 2– or 3–. (write the ion or radical with the correct valency).
Iodide
State whether the following ion or radical given below of a non-metallic element exhibits valency: 1–, 2– or 3–. (write the ion or radical with the correct valency).
Bisulphate
The first letter of a symbol is always written as a ______ letter and the second letter as a ______ letter.
