Multiple choice

The atomic number and mass number of an atom of an element are 27 and 60, respectively. Which of the following statements are incorrect conclusions for the given data?

(a) The name of the element is potassium. (b) It is a radioactive element. (c) The atom contains 33 neutrons in its nucleus. (d) It is a radioisotope of cobalt. (e) The ratio of neutron to the proton is less than 1.

  1. Both (a) and (b)

  2. Both (a) and (c)

  3. Only (a) and (e)

  4. Both (a) and (d)

  5. Both (b) and (c)
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Here, the ratio of number of neutrons to that of protons is greater than 1. Hence, it is a radioisotope of cobalt.

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