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प्रश्न
The symbols of the elements cobalt, aluminium, helium and sodium respectively written by a student are as
follows. Which symbol is the correct one ?
पर्याय
CO
AL
He
So
उत्तर
He
He is the correct symbol of helium.
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संबंधित प्रश्न
On what principle are the following methods of separation based? Give one example of a mixture for each of the methods mentioned in which they are used
Magnetic separation
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)
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:
Carbon
State the type of element for the following:
potassium
Give the symbol of the following element:
Neon
State the type of element for the following:
Fluorine
Give the symbol of the following element:
Phosphate
Write the radical of the following valency:
Sodium
What is meant by the term ‘symbol’?
