Multiple choice

Consider the following statements:

  1. Alpha partices have higher penetration power than beta particles and hence, damage internal organs.
  2. Radioactive iodine -131 accumulates in thyroid gland and causes cancer.

Which of the above statements is/are correct?

  1. Only 1

  2. Only 2

  3. Both 1 and 2

  4. Neither 1 nor 2
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
  1. Alpha partices lack penetration power but they have more energy than beta. Alpha particles cannot penetrate the skin to reach the internal organs whereas beta particles can damage internal organs.
    1. Radioactive iodine - 131 accumulates in thyroid gland and causes cancer. The cancer occurs from residual tissue radiation damage caused by the I131, and usually appear years after exposure, long after the I131 has decayed.

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