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प्रश्न
Explain the term ‘symbol’.
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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 of the following compounds of Sulphur trioxide.
Find the number and names of elements present in them and calculate their molecular masses.
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Explain the term ‘variable valency’.
Write the chemical formula of the following compound in a step-by-step manner –
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Calcium bicarbonate
Write the chemical formula of the following compound in a step-by-step manner –
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Write the chemical formula of the following compound in a step-by-step manner –
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Complete the statement given below by filling in the blank with the correct word.
The formula of silver [I] chloride is ________.
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+ |
