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प्रश्न
Write the full form of IUPAC. Name the elements represented by the following symbols:
Au, Pb, Sn, Hg
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उत्तर
The full form of IUPAC is International Union of Pure and Applied Chemistry.
Names of the elements:
Au - Gold
Pb - Lead
Sn - Tin
Hg - Mercury
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संबंधित प्रश्न
How are the elements with variable valency named? Explain with an example.
Match the noble gases – with their correct symbols:
| Noble gases | Symbols |
| (a) Helium | (1) Ar |
| (b) Neon | (2) Xe |
| (c) Argon | (3) Rn |
| (d) Krypton | (4) He |
| (e) Xenon | (5) Kr |
| (f) Radon | (6) Ne |
Match the symbols of metallic elements – with their correct combining power or capacity.
(a) K
(b) Zn
(c) Al
(d) Na
(e) Ca
Combining power or capacity – A : 3 ; B : 2 ; C : 1. (positive valencies)
Give the symbol of the following element:
Zinc
Give the symbol of the following element:
Aluminium
Write the radical of the following valency:
Oxygen
Write the radical of the following valency:
Sulphate
Write the chemical formula of the following:
aluminium chloride
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).
Bisulphite
What is the significance of the symbol of an element?
