A particle has the quark structure uˉdˉsˉ\bar{u}\bar{d}\bar{s}uˉdˉsˉ. Which of the following statements is correct for this particle?
It has a net charge of −1.6×10−19 C-1.6 \times 10^{-19}\text{ C}−1.6×10−19 C.
It has a strangeness of −1-1−1.
It has a baryon number of −1-1−1.
It is classified as a meson.
50 exam-style questions on AQA A Level Physics Particles, covering Constituents of the atom, Stable and unstable nuclei, Particles, antiparticles and photons, Particle interactions, Classification of particles, Quarks and antiquarks, and Applications of conservation laws. Each one has a worked solution and a mark scheme showing where the marks go.