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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
The formula of the sulphate of an element X is X2(SO4)3. The formula of nitride of element X will be :
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.
Hydrogen by ‘H’
Give the symbol and the number of atoms of the following elements present in water.
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)
State which element exists in the highest percentage in earth’s crust.
State the type of element for the following:
Carbon
State the type of element for the following:
Platinum
Give three reasons why – carbon dioxide is considered a compound, while carbon – an element.
Write the radical of the following valency:
magnesium
Write the radical of the following valency:
Hydroxide
