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- Multiple ChoicePlease save your changes before editing any questions.The rate at which a radioactive element decays is its ____.quarter lifewhole lifewonderful lifehalf life
- Multiple ChoicePlease save your changes before editing any questions.Energy in the sun is produced as a result of nuclear ____ reactions.fusionfissionwastesub
- Multiple ChoicePlease save your changes before editing any questions.The three types of nuclear radiation in order of increasing penetrating power arealpha, beta, gammaalpha, gamma, betabeta, alpha, gammagamma, alpha, beta
- Multiple ChoicePlease save your changes before editing any questions.
The process by which nuclei having small masses are combined to form a single larger nucleus is called nuclear ____.
fusion
fission
reactivity
waste
- Multiple ChoicePlease save your changes before editing any questions.Name the type of radioactive particle that can be stopped by a sheet of paper.alphabetagammalambda
- Multiple ChoicePlease save your changes before editing any questions.Name the most penetrating type of radiation.alphabetagammalambda
- Multiple ChoicePlease save your changes before editing any questions.What makes something radioactive?elements with an atomic number above 81an unstable nucleuscontaminated sewageIt decays over time
- Multiple ChoicePlease save your changes before editing any questions.If the half life of a radioactive element is 100yrs, how long would it take for the radioactivity to reduce by one half?200yrs100yrs50yrs300yrs
- Multiple ChoicePlease save your changes before editing any questions.What is nuclear fission?Big nucleus splits to small nucleiSmall nuclei fuse into a bigger nucleusStarsMaking compounds
- Multiple ChoicePlease save your changes before editing any questions.Barium-122 has a half-life of 2 minutes. A fresh sample weighing 80 g was obtained. If it takes 10 minutes to set up an experiment using barium-122, how much barium-122 will be left when the experiment begins?0.25g2.5g25g80g
- Multiple ChoicePlease save your changes before editing any questions.The half-life of strontium-90 is 25 years. How much strontium-90 will remain after 100 years if the initial amount is 4.0 g?3.0g0.25mg0.3g0.25g
- Multiple ChoicePlease save your changes before editing any questions.After the third half-life, how much of the sample is left?1/21/31/161/8
- Multiple ChoicePlease save your changes before editing any questions._______________ is the process by which unstable atoms emit radiation until they become stable.RadiationChemical ReactionRadioactive DecayIsotopes
- Multiple ChoicePlease save your changes before editing any questions.A benefit to using nuclear fission power is that it:supplies a lot of electricityconserves organic fuels, like oil, coal, and woodeliminates huge quantities of sulfur dioxides, which pollute our airall of the choices
- Multiple ChoicePlease save your changes before editing any questions.
what's the half life of this substance?1 day2 days3 days4 days - Multiple ChoicePlease save your changes before editing any questions.An isotope of an element has the same number of _________, but a different number of _________.Protons, electronsProtons, neutronsElectrons, neutrons
- Multiple ChoicePlease save your changes before editing any questions.What type of radioactive decay is shown here?Alpha decayBeta decayGamma decay
- Multiple ChoicePlease save your changes before editing any questions.Which type of radiation releases an electron?Alpha radiationBeta radiationgamma radiation
- Multiple ChoicePlease save your changes before editing any questions.What particle is released when an unstable isotope undergoes alpha radiation?an helium nucleusan electrona photon of light
- Multiple ChoicePlease save your changes before editing any questions.Which is NOT a characteristic of gamma radiation?High energized photon of lightCan be stopped by a sheet of aluminum foilIs the most harmful type of radiation to humansOur use of protection is concrete, or several inches of lead
- Multiple ChoicePlease save your changes before editing any questions.What type of decay is shown herealpha decaybeta decaygamma decay
- Multiple ChoicePlease save your changes before editing any questions.
What percent of an isotope will remain after 2 half lives?
50%
35%
12.5%
25%
- Multiple ChoicePlease save your changes before editing any questions.
What fraction of an isotope has decayed after 4 half lives?
3/4
7/8
15/16
1/2
- Multiple ChoicePlease save your changes before editing any questions.
Which particle below will be attracted to negatively charged matter?
alpha particle
beta particle
gamma ray
- Multiple ChoicePlease save your changes before editing any questions.
Which particle below will be attracted to positively charged matter?
alpha particle
beta particle
gamma ray
- Multiple ChoicePlease save your changes before editing any questions.How many neutrons does the isotope of lithium have?8345
- Multiple ChoicePlease save your changes before editing any questions.How many protons does this isotope of titanium have?48222670
- Multiple ChoicePlease save your changes before editing any questions.What is an isotope?A charged atomAn atom with different amounts of neutronsAn atom with different amounts of protonsA neutral atom