What is the atomic number of Helium?
...What is the atomic number of Helium?
1
2
3
9
Correct answer is B
No explanation has been provided for this answer.
What is the chemical symbol for Indium? ...
When the trioxonitrate (IV) salt of an alkali metal Y is heated, the formula of the residue is ...
An element, Q, contains 69% of63Q and 31% of 65Q. What is the relative atomic mass of ...
A mixture containing two salts of different solubility can be separated by ...
What is the atomic number of Tantalum? ...
The pollutant usually presents in a city which generates its electricity from coal? ...
Unsaturated organic compounds are identified by decolourization of ...
A mixture of kerosene and diesel oil can be separated by ...
An organic compound which decolorizes bromine water is likely to be? ...