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प्रश्न
Define: Elements-
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उत्तर
Elements : An element is the basic form of matter that cannot be broken down into simpler substances by chemical reactions.
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संबंधित प्रश्न
Give two symbols which have been derived from the " Latin names" of the elements.
An atom of an element is denoted by a “symbol” Explain the meaning of the term ‘symbol’. State a reason for representing the following element by its symbol.
Helium by ‘He’
Give the names and symbols of the first twenty elements of the periodic table.
State the type of element for the following:
Xenon
Write the radical of the following valency:
Sulphur [Sulphide]
Write the radical of the following valency:
Carbonate
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).
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).
Sulphide
What does the symbol '⇌' present in a chemical equation, mean?
What does the symbol '(g)' present in a chemical equation, mean?
