Physics 5054 · O Level · The atom

The atom — practice question

The hydrogen isotopes $^{1}_{1}\text{H}$ and $^{2}_{1}\text{H}$ are shown here. Fig. 8.1 contains a table for the counts of protons and neutrons in one nucleus of each isotope.
(a)[2]

Complete Fig. 8.1 so that it gives the numbers of protons and neutrons in one nucleus of each hydrogen isotope.

(b)[3]

Explain, using the behaviour of electrons, neutrons and protons, why atoms of $^{1}_{1}\text{H}$ and $^{2}_{1}\text{H}$ have no overall charge.

Worked solution & mark scheme

This 5-mark question has a full step-by-step worked solution and mark scheme. One marking point: “Put 1 in both boxes of the left column” …

  • Full mark scheme, point by point
  • Step-by-step worked solution
  • Write your answer & get it marked instantly by AI