CBSE Class 12 (Science) Modern Physics — practice questions
18 free MCQs with worked solutions. Tap any question for the answer + explanation, or practice them all in the app.
Practice CBSE Class 12 (Science) 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: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 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?