Which isotope is used in nuclear reactor?
| A. U-234 | B. U-238 |
| C. U-235 | D. All of these |
C
Which of the following statement is not correct about isotopes?
A. They have same atomic number
B. They have same number of protons
C. They have same chemical properties
D. They have same physical properties
D
Rutherford used ___________ particles in his experiments.
| A. He atoms | B. He+ |
| C. He2+ | D. He2- |
C
11Na has electronic configuration
| A. 1s22s23s1 | B. 1s22s22p7 |
| C. 1s22s22p53s2 | D. 1s22s22p63s1 |
D
A sub-shell that can accommodate 6 electrons is
| A. s | B. d |
| C. p | D. f |
C
M-shell has sub-shells
| A. 1s, 2s | B. 2s, 2p |
| C. 3s, 3p, 3d | D. 1s, 2s, 3s |
C
Which isotope is commonly used to irradiate cancer cells?
| A. Iodine-123 | B. Carbon-14 |
| C. Cobalt-60 | D. Iodine-131 |
C
Number of neutrons in 2713M are
| A. 13 | B. 14 |
| C. 27 | D. 15 |
B
Chlorine has two isotopes, both of which have
| A. Same mass number | B. Same number of neutrons |
| C. Different number of protons | D. Same number of electrons |
D
According to Bohr atomic model,
A. Each orbit has fixed energy so each orbit is called sub-energy level.
B. The energy of the electron is inversely proportional to its distance from the nucleus.
C. Light is absorbed when an electron jumps a lower energy orbit.
D. The farther the electron is from the nucleus, the more the energy it has.
D