Advertisements
Advertisements
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’
Advertisements
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 atoms of which of the following pair of elements are most likely to exist in free state ?
Why is the symbol S for sulphur, but Na for sodium and Si for silicon?
Give two examples of the following:
Liquid + Liquid mixture:
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)
Give the formula of the following acid:
Hydrochloric
Select the correct answer to the statement given below:
An element present in the earth’s crust, atmosphere and the human body.
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).
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).
Aluminate
What does the symbol '→' present in a chemical equation, mean?
The chemical symbol for sodium is
