UP Board Class 12 Modern Physics — practice questions
20 free MCQs with worked solutions. Tap any question for the answer + explanation, or practice them all in the app.
Practice UP Board Class 12 Modern Physics in the app →Atoms of an element differing in mass are called:How many isotopes does hydrogen have?Which element is said to have 32 isotopes?The nuclei of isotopes of one element contain the same number of:The density of a nucleus is:Nuclei are compared to a drop of:The difference between a nucleus and its constituents in mass is the:The mass defect is explained by whose equivalence of mass and energy?The average energy needed to remove one nucleon is the binding energy:The binding energy curve is flat between mass numbers:In that flat region the binding energy per nucleon is about:Who discovered radioactivity, in 1896?Becquerel made his discovery while studying:Becquerel's emission penetrated black paper and:Radioactivity is a decay undergone by a nucleus that is:How many types of radioactive decay occur in nature?In alpha decay, which nucleus is emitted?In beta decay, which particles may be emitted?A positron has the same mass as an electron but a charge that is:In gamma decay, what is emitted?