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प्रश्न
Give the names and symbols of the first twenty elements of the periodic table.
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उत्तर
| Name | Symbol | Name | Symbol |
| Hydrogen | H | Sodium | Na |
| Helium | He | Magnesium | Mg |
| Lithium | Li | Aluminium | Al |
| Beryllium | Be | Silicon | Si |
| Boron | B | Phosphorus | P |
| Carbon | C | Sulphur | S |
| Nitrogen | N | Chlorine | Cl |
| Oxygen | O | Argon | Ar |
| Fluorine | F | Potassium | K |
| Neon | Ne | Calcium | Ca |
संबंधित प्रश्न
Out of ozone, phosphorus, sulphur and krypton, the elements having the lowest and highest atomicities are respectively :
What do the following symbol stand for?
2H
What is meant by atomicity? Name the diatomic element.
Give the symbol of the following element:
Bromine [bromide]
State the most reactive and the least reactive metal from the following – Zn, Ag, Na, Fe, Cu, Pb.
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).
Permanganate
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).
Plumbite
Write the constituent elements and their symbols for the following compounds.
- Carbon monoxide
- Washing soda
Which letter is never used in any element symbol?
What is the rarest natural element on the earth?
