Question

Select the keyword or phrase that will best complete each sentence. are high-energy particles that are emitted from a radioactive nucleus and contains two protons and two neutrons. Key terms: Alpha particles becquerel Beta particles Bq chain reaction сі are high-energy electrons emitted from a radioactive nucleus. The is an SI unit used to measure radioactivity. It equals one disintegration per second is is abbreviated Curie fission fusion is the process by which a neutron produced during fission bombards a neighboring nucleus to produce a different nucleus and more neutrons. Gamma rays nuclear reaction Positron Nuclear neutrons is the splitting apart of a nucleus into lighter nuclei and Radioactive decay Radioactivity is the energy emitted by a radioactive isotope.

Answer 1

1. Alpha particles contain 2 protons and 2 neutrons. They are identical to a charged (+2 charge) He nuclei.

2. Beta particles are high energy electrons emitted from a radioactive nucleus.

3. The becquerel is the SI unit to measure radioactivity.1 becquerel is is one atomic disintegration per second and it is abbreviated as Bq.

Curie is also a unit of activity measurement, but it is not SI

4. A Chain reaction is the process by which a neutron produced during fission bombards a neighboring nuclei to produce more neutrons and a different nucleus.

5. Nuclear Fission is the splitting of a nucleus into lighter nuclei and neutrons.

Note that Nuclear fusion fusion is the reverse process. That is joining of two lighter nuclei to form a heavier nuclei.

6. Gamma rays is the energy emitted by a radioactive isotope.

Note that A gamma ray, or gamma radiation is an electromagnetic radiation.

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