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प्रश्न
Explain the term ‘symbol’.
उत्तर
Symbol is a short form or abbreviated name of the element.
OR
“Symbol of an element is the ‘first letter’ or the ‘first letter and another letter’ of the English name or Latin name of the element”.
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संबंधित प्रश्न
Write the molecular formula for the oxide and sulphide of following elements of Calcium
The valency of aluminium is 3. Write the valency of other radicals present in the following compounds of Aluminium nitride
The valency of aluminium is 3. Write the valency of other radicals present in the following compounds of Aluminium sulphate.
Write the molecular formulae of Ammonium carbonate.
Explain the term ‘variable valency’.
Write the chemical formula of the following compound in a step-by-step manner –
Calcium hydroxide
Write the chemical formula of the following compound in a step-by-step manner –
Potassium permanganate
Write the chemical formula of the following compound in a step-by-step manner –
Magnesium nitride
Write the chemical formula of the following compound in a step-by-step manner –
Iron [II] hydroxide
Match the statements – 1 to 10 below with their correct answers from – A to J.
| Column I | Column II |
| 1. Elements having valency of two. | A: Br1− |
| 2. An anion | B: Divalent |
| 3. A gaseous non-metal | C: Reactants |
| 4. A cation. | D: Ammonium |
| 5. The term used for the substances which take part in the chemical reaction | E: Nitric oxide |
| 6. The meaning of the symbol ‘Δ’ over the arrow in a chemical equation. | F: Nitrogen |
| 7. The chemical name for nitrogen monoxide. | G: Zero |
| 8. A radical containing nitrogen and hydrogen only | H: Nitrous oxide |
| 9. The chemical name for dinitrogen oxide | I: Heat required |
| 10. The valency of noble gases | J: K1+ |
