- A11 Electrons, 11 protons and 13 neutrons.
- B11 Electrons, 13 protons and 11 neutrons.
- C11 Protons and 13 neutrons.
- D11 Protons and 13 electrons.
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Kα wavelength emitted by an atom of atomic number Z = 11 is λ. Find the atomic number for an atom that emits Kα radiation with wavelength 4l
|
(a) Z = 6 |
(b) Z = 4 |
(c) Z = 11 |
(d) Z = 44 |
In an hydrogen atom, the electron revolves around the nucleus in an orbit of radius 0.53
. Then the electrical potential produced by the nucleus at the position of the electron is
|
(a) – 13.6 V |
(b) – 27.2 V |
(c) 27.2 V |
(d) 13.6 V |

As compared 12C atom, 14C atom has
|
(a) Two extra protons and two extra electrons |
|
(b) Two extra protons but no extra electrons |
|
(c) Two extra neutrons and no extra electrons |
|
(d) Two extra neutrons and two extra electrons |
Two spheres A and B of radius 4cm and 6cm are given charges of 80 μC and 40 μC respectively. If they are connected by a fine wire, the amount of charge flowing from one to the other is
|
(a) 20 μC from A to B |
(b) 16 μC from A to B |
|
(c) 32 μC from B to A |
(d) 32 μC from A to B |