Q1 · 2025 · Paper 2Simple familiar2 marks
QUESTION 1 (2 marks)
An anti-hydrogen atom is composed of the anti-particles of the corresponding components of a hydrogen atom. A hydrogen atom contains one proton in the nucleus and one electron.
Identify two components of an anti-hydrogen atom.
WORKED SOLUTION
2 marksQCAA guide · typeset solution
ANSWER
See worked solution below.
Worked solution
1. a negatively charged antiproton in the nucleus
2. one positively charged positron
identifies one component
identifies a second component
One QCAA sample method typeset for web; criterion wording is adapted from the official marking guide.
How many marks did you earn?
Compare your working with the guide above.