C: e
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The nuclei of common isotopes of hydrogen, helium, lithium and beryllium are shown. Which nucleus contains equal numb…
A positively charged meson consists of a quark and an antiquark. What could be the quark and antiquark?
Which flavours of quark have charge +⅔ e?
Which row describes the relative ionizing power and the relative penetration power per unit length in air of α-partic…
A nucleus of sodium-21, ²¹₁₁Na, decays to form a new nucleus containing 10 protons and 11 neutrons. Which leptons are…
A nucleus of bismuth-212 (²¹²Bi) decays by the emission of an α-particle and γ-radiation.