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State symbols

Question	Answer
beta particle	a high-speed electron or positron, especially one emitted in radioactive decay
particle accelerator	a device, such as a cyclotron or linear accelerator, that accelerates charged subatomic particles or nuclei to high energies
bombardment	act (or an instance) of subjecting a body or substance to the impact of high-energy particles
Nuclear reactor	any of several devices in which a chain reaction is initiated and controlled with the resulting heat typically used for power generation and the neutrons and fission products used for military, experimental, and medical purposes.
radioactivity	spontaneous emission of radiation, either directly from unstable atomic nuclei or as a consequence of a nuclear reaction
isotope	one of two or more atoms having the same atomic number but different mass numbers, due to a different number of neutrons in the nucleus
fission	a nuclear reaction in which an atomic nucleus, especially a heavy nucleus such as an isotope of uranium, splits into fragments, usually two fragments of comparable mass, releasing from 100 million to several hundred million electron volts of energy
half-life	the time required for half the nuclei in a sample of a specific isotopic species to undergo decay
fusion	a nuclear reaction in which nuclei combine to form more massive nuclei with the simultaneous release of energy
alpha particle	positively charged particle, indistinguishable from a helium atom nucleus and consisting of two protons and two neutrons
nucleon	a proton or a neutron, especially as part of an atomic nucleus
gamma ray	electromagnetic radiation emitted by radioactive decay and having energies in a range from ten thousand to ten million electron volts

beta particle	Answer: a high-speed electron or positron, especially one emitted in radioactive decay	1	0	false
particle accelerator	Answer: a device, such as a cyclotron or linear accelerator, that accelerates charged subatomic particles or nuclei to high energies	2	0	false
subjecting	act (or an instance) of _____ a body or substance to the impact of high-energy particles	3	1	true
products	any of several devices in which a chain reaction is initiated and controlled with the resulting heat typically used for power generation and the neutrons and fission _____ used for military, experimental, and medical purposes.	4	1	true
radioactivity	Answer: spontaneous emission of radiation, either directly from unstable atomic nuclei or as a consequence of a nuclear reaction	5	0	false
isotope	Answer: one of two or more atoms having the same atomic number but different mass numbers, due to a different number of neutrons in the nucleus	6	0	false
fission	Answer: a nuclear reaction in which an atomic nucleus, especially a heavy nucleus such as an isotope of uranium, splits into fragments, usually two fragments of comparable mass, releasing from 100 million to several hundred million electron volts of energy	7	0	false
half-life	Answer: the time required for half the nuclei in a sample of a specific isotopic species to undergo decay	8	0	false
combine	a nuclear reaction in which nuclei _____ to form more massive nuclei with the simultaneous release of energy	9	1	true
nucleus	positively charged particle, indistinguishable from a helium atom _____ and consisting of two protons and two neutrons	10	1	true
nucleon	Answer: a proton or a neutron, especially as part of an atomic nucleus	11	0	false
gamma ray	Answer: electromagnetic radiation emitted by radioactive decay and having energies in a range from ten thousand to ten million electron volts	12	0	false