4.
A change in the physical state can be brought about:
7.
Which of the following statement is not true about an atom?
8.
What is the symbol of helium?
10.
Which of the following would weigh the highest?
12.
Mass of one atom of oxygen is:
13.
A change in the physical state can be brought about:
14.
What is the mass of 1 mole of nitrogen atoms.
16.
The chemical symbol for sodium is:
17.
Which of the following contains maximum number of molecules?
19.
Which of the following has maximum number of atoms?
20.
The chemical symbol for nitrogen gas is:
24.
What is the mass of 0.5 mole of water molecules?
26.
What is the symbol of cobalt?
30.
Calculate the mass of 0.5 mole of N atoms
