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प्रश्न
What do you understand by :
Noble gases
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उत्तर
Noble gases : Noble gases are those which do not react chemically with other elements or compounds e.g. helium, neon, etc.
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संबंधित प्रश्न
Write the names and symbols of the first twenty elements that you have studied in class VI & VII.
How are the elements with variable valency named? Explain with an example.
Give the symbol of the following element:
Sodium
State the type of element for the following:
Xenon
State the type of element for the following:
Phosphorus
Write the radical of the following valency:
Nitrate
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
Write the symbols for the following elements and classify them as solid, liquid and gas. Aluminum, Carbon, Chlorine, Mercury, Hydrogen and Helium
The name copper was taken from ______.
Write a note on Greem symbols.
