Judge the assertion and the reason

Exercise and reference answers

Questions

1. Reason

   It has to dominate the Coulomb repulsion between the protons packed inside the nucleus.

   Verdict

   Both are true; the reason explains the assertion.

   Assertion

   The nuclear force must be far stronger than the Coulomb force.

2. Reason

   Three types of radioactive decay occur in nature.

   Verdict

   Both are true; the reason does not explain the assertion.

   Assertion

   Nuclear density is the same for every nucleus.

3. Reason

   The missing mass is called the mass number of the nucleus.

   Verdict

   The assertion is true and the reason is false.

   Assertion

   A nucleus weighs less than its separated constituents.

4. Reason

   Beta decay emits electrons or positrons from the nucleus.

   Verdict

   The assertion is false and the reason is true.

   Assertion

   Alpha decay emits an electron from the nucleus.

Instructions

Read both statements, then pick the verdict that fits.

Explanation