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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.
Hydrogen by ‘H’
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उत्तर
Symbols: The short form or abbreviated name of the element (or radicals). The reason for representing the following element by its symbol is as follow:
Hydrogen by ‘H’ – First letter of the name of the element
संबंधित प्रश्न
The scientist who proposed the first letter (or first letter and another letter) of the Latin or English name of
an element as its symbol, was :
The atoms of which of the following pair of elements are most likely to exist in free state ?
Explain the terms 'valency' and 'variable valency'.
The formula of the sulphate of an element M is M2(SO4)3
Write the formula of it
Chloride
Give two examples of the following:
Solid + Liquid mixture
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)
State the type of element for the following:
potassium
Write the radical of the following valency:
Sulphur [Sulphide]
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
The symbol of tungsten is _______.
