27 solutions available
Question 3A radioactive source emits three type of radiations.(a) Name the radiation of zero mass.(b) Name the radiation which has the lowest...
Question 7State following four properties each of α, β and γ radiations — (a) nature, (b) charge, (c) mass, and (d) effect of electric field.
Question 12A nucleus 1124Na_{11}^{24}\text{Na}1124Na is β-radioactive.(a) What are the numbers 24 and 11 called?(b) Write the equation representing...
Question 5What are isobars? Give one example.
Question 6Name the atoms of a substance having same atomic number, but different mass numbers. Give one example of such a substance. How do the...
Question 14What happens to the position of an element in the periodic table when it's nucleus emits (a) an α particle, (b) a β particle and (c) γ...
Question 15What changes occur in a nucleus of a radioactive element when it emits (a) an alpha particle, (b) a beta particle, (c) gamma radiation?...
Question 16A nucleus ZAX_{Z}^{A}\text{X}ZAX emits 2 α particles and 1 β particle to form a 85222R_{85}^{222}\text{R}85222R nucleus. Find the atomic...
Question 17What are radio isotopes? Give one example of a radio isotope. State one use of radio isotopes.
Question 18Why are the alpha particles not used in radio therapy? [Hint : alpha particles cannot penetrate the human skin]
Question 19When does the nucleus of an atom tend to become radioactive?
Question 20State the medical use of radioactivity.
Question 21Arrange the α, β, and γ radiation in ascending order of their biological damage. Give reason.
Question 22Name two main sources of nuclear radiations. How are the nuclear radiations harmful?
Question 23State two safety measures to be taken while establishing a nuclear power plant?
Question 24What is meant by nuclear waste? State one way for the safe disposal of nuclear waste?
Question 25State three safety precautions that you would take while handling the radioactive substances.
Question 26Why should a radioactive substance not be touched by hands?
Question 27What do you mean by background radiations? Name it's two sources. Is it possible for us to keep ourselves away from it?
Question 8Complete the following nuclear changes —(a) xaP⟶Q+−10β_{x}^{a}\text{P} \longrightarrow Q + _{-1}^{0}\text{β}xaP⟶Q+−10β(b) 92238U⟶...
Question 10Which of the following is the radio isotope in each pair (a), (b) and (c) ?(a) 612C_{6}^{12}\text{C}612C, 614C_{6}^{14}\text{C}614C(b)...
Question 4What is nuclear fission? Name the substance used for it. Write one fission reaction.
Question 9(a) What is nuclear fusion? Give one example and write it's nuclear reaction.(b) What other name is given to nuclear fusion? Give reason.
Question 11(a) Write one nuclear fusion reaction.(b) State the approximate value of energy released in the reaction mentioned in part (a).(c) Give...
Question 13Give two examples of nuclear fusion.
Question 1Complete the following nuclear fission reactions:(a) 92235U_{92}^{235}\text{U}92235U + 01n_{0}^{1}\text{n}01n ⟶ 56Ba_{56}\text{Ba}56Ba +...
Question 2Complete the following fusion reactions —(a) 23He_{2}^{3}\text{He}23He + 12H_{1}^{2}\text{H}12H ⟶ 2He_{2}\text{He}2He + 1H_{1}...