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प्रश्न
Write the radical of the following valency:
Calcium
विकल्प
1+
2+
3+
1−
2−
3−
उत्तर
2+
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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’
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Match the symbols of – radicals – with their correct combining power or capacity, (valency).
(a) OH
(b) So4
(c) No3
(d) Co3
Combining power or capacity – A : 3; B : 2; C : 1. (negative valencies)
Write the formula of the compound formed – given symbols and combining power or capacity (valency) of the following element in the compound.
Na1+ Cl1-
Give the symbol of the following element:
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Give three reasons why – carbon dioxide is considered a compound, while carbon – an element.
Write the radical of the following valency:
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What is meant by the term ‘symbol’?
In the same way in chemistry, each element is denoted by a ______.
