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प्रश्न
Fill in the blank:
Dalton used symbol _____ for oxygen and _____ for hydrogen.
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उत्तर
Dalton used symbol [⚪] for oxygen and [☉] for hydrogen.
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संबंधित प्रश्न
Define: Compounds
What do you understand by :
Noble gases
Define atomic mass unit. What is its symbol ?
Give the names and symbols of the first twenty elements of the periodic table.
Give the symbol and the number of atoms of the following elements present in zinc chloride.
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:
Sulphite
Name the following:
An acid whose formula is ‘H2CO3’.
State the valency of the following metallic element and write symbol with the valency
Potassium
