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General Knowledge > General Science

BASIC OF LIFE - CELLS MCQs

Half Life, Diversity Of Life, Cell The Unit Of Life

Total Questions : 115 | Page 12 of 12 pages
Question 111. When an element loses protons, its __________changes
  1.    protonic number
  2.    electronic number
  3.    neutronic number
  4.    atomic number
 Discuss Question
Answer: Option D. -> atomic number
Question 112. The half life of iodine-131 is 8
  1.    312.5%
  2.    31.25%
  3.    .3125%
  4.    3.125%
 Discuss Question
Answer: Option D. -> 3.125%
Question 113. Barium-122 has a half-life of 2 minutes
  1.    0.25g
  2.    2.5g
  3.    25g
  4.    80g
 Discuss Question
Answer: Option B. -> 2.5g
Question 114. Fermium-253 has a half-life of 0
  1.    0.334 seconds
  2.    3.34 seconds
  3.    1.77 seconds
  4.    13.4 seconds
 Discuss Question
Answer: Option B. -> 3.34 seconds
Question 115. Earth elements decay and change into another element in a process called_____________
  1.    radiation
  2.    isotope
  3.    radioactive decay
  4.    half-life
 Discuss Question
Answer: Option C. -> radioactive decay

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