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Question:- Nucleon is the name which is employed for: (a) Electron and proton (b) proton and neutron (c) Electron and neutron (d) None of these
Answer:- b
Question:- The mass number of an atom is: (a) Number of nucleons in the nucleus (b) Number of protons in the nucleus (c) Number of neutrons in the nucleus (d) None of these
Answer:- a
Question:- Atom is electrically: (a) Positive (b) negative (c) bipositive (d) neutral
Answer:- d
Question:- The atomic properties depend upon: (a) Number of nucleons in the nucleus (b) Number of protons in the nucleus (c) Number of neutrons in the nucleus (d) None of these
Answer:- d
Question:- The number of neutrons and protons in the nucleus of 88Ra226 are: (a) 138 and 88 (b) 88 and 138 (c) 226 and 88 (d) 88 and 226
Answer:- a
Question:- Who was the inventor of radioactivity? (a) Madam Curie (b) Irine Curie (c) Henery Bacqurel (d) Rutherford
Answer:- c
Question:- The penetrating power of which of the following invisible radiations emitting from the nucleus has its maximum value: (a) a-rays (b) f)-rays (c) y-rays (d) None of these
Answer:- c
Question:- Which of the following is negatively charged? (a) Alpha-rays (b) Beta-rays (c) Gama-rays (d) X-ray
Answer:- a
Question:- How many charges alpha-rays consist of? A. Two unit positive charges B. Unit negative charge C. Unit positive charge D. None of these
Answer:- A
Question:- Which of the following is not a radioactive element? A. Astatine B. Francium C. Titanium D. Zirconium
Answer:- D
Question:- Which of the following is the unit of radioactivity? A. Curie B. Becquerel C. Rutherford D. All of these
Answer:- B
Question:- The substance (element) obtained after emission of a beta-particle from 11Na22: A. Mg B. Mn C. Ag D. Pb
Answer:- A
Question:- The half life of a radioactive substance is 4 months then the time spent in decaying ¾th of the substance would be: A. 3 months B. 4 months C. 8 months D. 12 months
Answer:- C
Question:- The estimation of the age of the earth is done by: A. Uranium dating B. Carbon dating C. Atomic clock D. Bio clock
Answer:- A