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प्रश्न
Define: Elements-
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
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 which element exists in the highest percentage in earth’s crust.
Give the symbol of the following element:
Potassium
Give the symbol of the following element:
Phosphate
Write the radical of the following valency:
Oxygen
Write the radical of the following valency:
Potassium
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).
Aluminate
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).
Plumbite
The pictorial symbol for water given by the alchemists was
