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प्रश्न
What do the following symbol stand for?
H
उत्तर
H stands for one atom of hydrogen.
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संबंधित प्रश्न
Name the element used as a standard for atomic mass scale.
Why is the symbol S for sulphur, but Na for sodium and Si for silicon?
The formula of the sulphate of an element M is M2(SO4)3
Write the formula of it
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)
In the chemical word equation –
Zinc + Sulphuric acid → Zinc sulphate + Hydrogen.
State the reactants and products of the above reaction. What does the arrow indicate?
In the chemical word equation – Zinc + Sulphuric acid → Zinc sulphate + Hydrogen
The molecular equation is :
Zn + H2SO4 → ZnSO4 + H2[g].
State what [g] represents.
Give the symbol of the following element:
Bromine [bromide]
State the type of element for the following:
Calcium
State the most reactive and the least reactive metal from the following – Zn, Ag, Na, Fe, Cu, Pb.
Write the chemical formula of the following:
Sodium bromide
