Olympiad (Class 12) Nuclei — practice questions
22 free MCQs with worked solutions. Tap any question for the answer + explanation, or practice them all in the app.
Practice Olympiad (Class 12) Nuclei in the app →If an atom were blown up to the size of a classroom, the nucleus would be about as big as a:Two atoms of one element have the same protons but different masses. They are:The number of protons inside a nucleus is given by its:The total number of protons and neutrons in a nucleus is called its:A single word covering both a proton and a neutron in the nucleus is:A gold nucleus holds 197 nucleons of which 79 are protons. Its neutron count is:A neutron sitting outside any nucleus is unstable and decays into a proton, an antineutrino and an:The mean life of a free neutron before it decays is about:Deuterium, an isotope of hydrogen, has one proton and how many neutrons?Measurements show that nuclear density does not change from one nucleus to another. It is:Because their density is the same throughout, nuclei are compared with a drop of:The difference between a nucleus mass and the total mass of its free nucleons is the:The energy equivalent of the mass defect, needed to split a nucleus apart, is the:The binding energy divided by the number of nucleons gives the binding energy:For most middle sized nuclei the binding energy per nucleon is roughly:The binding energy per nucleon stays nearly constant in the middle range because the nuclear force is:Compared with the Coulomb force between charges, the nuclear force is:The nuclear force between two protons, two neutrons or a proton and neutron is about:Joining light nuclei into a heavier one releases energy. This process is called:Radioactivity was discovered in 1896, purely by accident, by:One becquerel of activity means exactly one decay in every:The time in which a sample of radioactive nuclei falls to half its number is the: