General
✓✗Atoms are made up of
- 2 sub atomic particles
- 3 sub atomic particles
- 4 sub atomic particles
- 5 sub atomic particles
General
✓✗Charge on a neutron is
- +1
- -1
- +2
- No charge
General
✓✗The innermost energy level is
- L
- M
- N
- K
General
✓✗Which one of the following is not an isotope of Oxygen?
General
✓✗Neutron was discovered by
- Thomson
- Goldstein
- Rutherford
- Chadwick
General
✓✗Absolute mass of an electron is
-
gm
-
gm
-
u
-
gm
General
✓✗Third energy level can hold maximum of
- 2 electrons
- 8 electrons
- 18 electrons
- 32 electrons
General
✓✗The radioactive isotope used as a fuel in reactors of nuclear power plants is
- Iodine -131
- Cobalt -60
- Uranium -235
- All of these
General
✓✗When we rub a comb on dry hair, then the comb attracts small pieces of papers, this indicates that
- Hair is made up a charged particles
- atom of matter possess charged particles
- Pieces of paper are attracted due to oil in the hair
- none of these
General
✓✗Third energy level is
- O
- K
- N
- M