Which describes a radioactive substance?A.A substance that forms weak molecular bondsB.A substance that forms positive or negative ionsC.A substance that generates radio-wave frequenciesD.A substance whose nuclei do not stay together

What does radioactive mean?A.Generating positively or negatively charged ionsB.Having electron transitions at radio-wave frequenciesC.Emitting radiation as a result of unstable nucleiD.Absorbing high-energy electromagnetic radiation

Radio activity is the process by which a nucleus of an unstable atom loses energy by emitting ionizing radiation. A material that spontaneously emits this kind of radiations which includes a, b, g rays is considered radioactive.The positively charged particle with 2 units of relative of charge and 4 units of mass isSelect an answerABCDpositron

Radio activity is the process by which a nucleus of an unstable atom loses energy by emitting ionizing radiation. A material that spontaneously emits this kind of radiations which includes a, b, g rays is considered radioactive.The isotope used for detecting age of wood materialSelect an answerABCD

What is the definition of a radioisotope?A.A nonradioactive isotope of an elementB.A radioactive isotope of an elementC.Any one of the isotopes of an elementD.Any particle emitted by radioactive decay

. What is meant by a substance?