Advertisements
Advertisements
Question
What do you understand by :
Noble gases
Solution
Noble gases : Noble gases are those which do not react chemically with other elements or compounds e.g. helium, neon, etc.
APPEARS IN
RELATED QUESTIONS
Select elements and compounds from the following list: Iron, plaster of paris, chalk, common salt, copper, aluminium, calcium oxide, cane sugar, carbon, silica, sodium sulphate, uranium, potassium carbonate, silver, carbon dioxide.
Why is the symbol S for sulphur, but Na for sodium and Si for silicon?
Give the symbol and the number of atoms of the following elements present in sodium 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)
Select the correct answer from the choice given below.
The symbol of mercury is
State the type of element for the following:
Bromine
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 a chemical symbol represent?
Antimony has the highest tensile strength.
What is the rarest natural element on the earth?
