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- 1. Multiple Choice
What is the half-life of iodine-131?32 days8 days16 days24 days - 2. Multiple Choice
Which subatomic particle has a negative charge?
proton
neutron
electron
cybertron
- 3. Multiple ChoiceThe atomic mass on the periodic table is an average of all the ____ of an element based on abundance.protonsisotopesionscharges
- 4. Multiple ChoiceAn electron has a negative charge and a mass of ___ amu.01.52
- 5. Multiple ChoiceThe number of protons in an element can be found by:looking up the group the element is in.subtracting the atomic mass from atomic numberlooking up the atomic masslooking up the atomic number
- 6. Multiple ChoiceA neutral atom of the element sodium has 11 protons and ____ electrons.2223811
- 7. Multiple ChoiceDo the following atoms belong to the same element? Explain
Aluminum-27
An atom with 14 protons and 13 neutronsYes because they have the same number of protonsYes because they have the same massNo because they have different number of protonsNo because they have different number of neutrons - 8. Multiple ChoiceWhat is the mass number?the number of protonsthe number of protons and neutronsthe number of neutronsthe number of protons and electrons
- 9. Multiple ChoiceWhat is the atomic number of this atom?459none of the above
- 10. Multiple ChoiceWhat is a proton made up of ?two up quarks and one down quarktwo charm quarks and three strange quarksone top quark and two bottom quarksit is indivisible
- 11. Multiple ChoiceWhat is a neutron made up of?it is indivisibletwo down quarks and one up quarkone strange quark and two charm quarksno up quarks and one down quark
- 12. Multiple ChoiceWhat is Half-life?The amount of time it takes for some of the nuclei in a sample of the isotope to decayThe amount of time it takes for half the electrons in a sample of the isotope to decayThe amount of time it takes for half the nuclei in a sample of the isotope to decaythe amount of time it takes to double the nuclei in a sample of the isotope to decay
- 13. Multiple Choice
isotopes of the same element have a different
number of protons
number of electrons
number of neutrons
atomic number
- 14. Multiple Choice
When electric forces and nuclear forces act opposite, what will be happen?
radioactivity
half life
radioactive decay
isotopes
- 15. Multiple Choice
What happens during radioactive decay?
the atom gains electrons
neutrons accumulate in nucleus
the atom looses electrons
the nucleus decays
- 16. Multiple Choice
The most basic building block of all matter is known by which of the following terms?
Compound
Atom
Chemical
Element
- 17. Multiple ChoiceDescribe an Electron Cloud?the mist outside of an atomhome of the protonswhere electrons are locatednucleus
- 18. Multiple ChoiceFour isotopes of lead include lead-204, lead-206, lead-207, and lead-208. The average atomic mass of lead is 207.2. Which isotope of lead is likely to be the most abundant.204206207208
- 19. Multiple ChoiceThe splitting of a nucleus into smaller nuclei isfusionfissiondecaygamma radiation
- 20. Multiple ChoiceWhere does fusion occur naturally?UnderwaterAll around usIn the radioactive wasteOn the sun
- Answer choicesTagsAnswer choicesTags