Advertisements
Advertisements
प्रश्न
Why is the symbol S for sulphur, but Na for sodium and Si for silicon?
Advertisements
उत्तर
In most cases, the first letter of the name of the element is taken as the symbol for that element and written in capitals (e.g. for sulphur, we use the symbol S). In cases where the first letter has already been adopted, we use a symbol derived from the Latin name (e.g. for sodium/Natrium, we use the symbol Na). In some cases, we use the initial letter in capital together with a small letter from its name (e.g. for silicon, we use the symbol Si).
APPEARS IN
संबंधित प्रश्न
Explain the significance of the symbol H.
Match the symbols of non-metallic elements with their correct combining power or capacity.
(a) O
(b) S
(c) Cl
Combining power or capacity A : 3; B : 2; C : 1. (negative valencies)
In the chemical word equation –
Zinc + Sulphuric acid → Zinc sulphate + Hydrogen.
State the reactants and products of the above reaction. What does the arrow indicate?
Select the correct answer from the choice given below.
The type of element-phosphorus
Give the symbol of the following element:
Sulphate
Write the chemical formula of the following:
zinc oxide
Give the formula of the following gas:
Ammonia
Define the term ‘valency’.
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).
Nitrate
What does the symbol '(l)' present in a chemical equation, mean?
