All isotopes of the same element have ______________
A). Different atomic numbers and different atomic mass
B). Different atomic numbers and the same atomic mass
C). The same atomic number but different atomic masses
D). The same atomic number and the atomic mass
The same atomic number but different atomic masses
2. Removal of carbon particles from air involves the principle of
4. The purity of gold is expressed in carats. The purest form of goldis.
6. Question 8.10:What are the different oxidation states exhibited by the lanthanoids?
7. Which of the following is not a nitrogenous fetiliser?