Related Questions

Artificially produced radioactive isotopes are used for
A power generation
B treatment of certain diseases
C initiating nuclear fission & fusion
D all A, B & C
কোনো উদ্ভিদ বা প্রাণীর মৃত্যুকাল নির্ণয়ের জন্য নিম্নের কোন তেজস্ক্রিয় আইসোটোপ ব্যবহার করা হয়? (Which one of the following radioactive isotopes is used to determine how long before a plant or animal died?)
A C12
B C14
C U235
D I131
240 radioactive grams of goo loses half its radioactivity every 10 days. How many grams of radioactive goo is left in 40 days?
A 120
B 60
C 15
D none
The half life period of a radioactive substance is best determined by counting the number of alpha particles emitted per second in a Geiger Muller counter from its known quantity. If the half life period of a radioactive substance is one month, then
A $${\frac{3}{4}^{{\text{th}}}}$$ of it will disintegrate in two months
B It will completely disintegrate in two months
C It will completely disintegrate in four months
D $${\frac{l}{8}^{{\text{th}}}}$$ of it will remain intact at the end of four months
Isotopes-
A আইসোটোপস হইল সই সমস্ত পরমাণু যাহাদের প্রোটন সংখ্যা সমান কিন্তু নিউট্রন সংখ্যা ভিন্ন
B একই মৌলের আইসোটোপস সমূহের ভিন্ন ভিন্ন ভর সংখ্যা থাকে
C একই মৌলের আইসোটোপস সমূহের রাসায়নিক ধর্ম একই রকমের
D সবকটি
Which one is different for the neutral atoms of the isotopes of an element?
A Number of electrons
B Atomic weight
C Atomic number
D Number of Protons
The following are the half lives of four active isotopes. Which one of the following is the most dangerous to handle?
A 3 billion years
B 100 years
C 0.01 minute
D 13 days
Isotopes of same elements have
A Same atomic number and different masses
B Same chemical properties but different atomic numbers
C Different masses and different atomic numbers
D Different chemical properties and same atomic numbers
Uranium has isotopes
A U234
B U235
C U238
D All of these
In natural uranium, the constituents of three naturally occurring isotopes are
A U234 = 0.006%, U235 = 0.712% and U238 = 99.282%
B U234 = 0.712%, U235 = 0.006% and U238 = 99.282%
C U234 = 99.282%, U235 = 0.006% and U238 = 0.712%
D U234 = 0.006%, U235 = 99.282% and U238 = 0.712%

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