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प्रश्न
What does the symbol '(aq.)' present in a chemical equation, mean?
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उत्तर
'(aq.)' represents for a solution in water (aqua).
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संबंधित प्रश्न
Write the names and symbols of the first twenty elements that you have studied in class VI & VII.
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’
Explain the terms ‘chemical formula’.
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)
Write the formula of the compound formed – given symbols and combining power or capacity (valency) of the following element in the compound.
K1+ Cl1-
Write the formula of the compound formed – given symbols and combining power or capacity (valency) of the following element in the compound.
Ca2+ NO31-
Give the symbol of the following element:
Neon
Give the symbol of the following element:
Boron
Give the symbol of the following element:
Bromine [bromide]
Give the formula of the following gas:
Nitrogen dioxide
