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प्रश्न
Fill in the blank with the correct word from the options given below:
A symbol represents a short form of a / an ________.
विकल्प
atom
element
molecule
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उत्तर
A symbol represents a short form of a / an element.
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संबंधित प्रश्न
Give the names and symbols of five familiar substances which you think are elements.
The anion of an element has ______.
What do the following symbol stand for?
2H
For writing a chemical formula – ‘symbols’ and combining capacity of an element with hydrogen i.e. ‘valency’ should be known. Explain the term – combining the capacity of an element i.e. valency.
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)
Give the symbol of the following element:
Aluminium
State the type of element for the following:
Calcium
Give three reasons why – carbon dioxide is considered a compound, while carbon – an element.
Give the symbol of the following element:
Hydroxide
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).
Sulphate
