STOICHIOMETRY & RADIOACTIVE DECAY
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| Carbon has how many amu? | 12
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| what does 1 amu equal to? | 1 g / mol
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| density | mass / volume
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| specific gravity | density of substance / density of water
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| Does specific gravity have units? | NO
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| What is characteristic of oxidizing agents? | lewis acids, permanganates, dichromate, and lots of oxygens
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| What is characteristic of reducing agents? | lewis bases and lots of hydrogens
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| Disproportionation reactions | single species undergo both oxidation and reduction
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| For a redox titration, at equivalence potential, cell potential = | 0
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| What does an alpha particle consist of? | 2 protons and 2 neutrons
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| What happens during gamma decay? | nucleus transitions from higher energy level to lower energy level and emits a gamma ray
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| Difference btwn gamma ray and photon | photon is emitted when energy levels are close to each other, gamma ray emitted when energy level differences are a lot bigger
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| What is a beta particle? | -electron
-positron (antimatter equivalent to an electron)
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| What happens during alpha decay? | loses 4 / 2 He atom (subtract form original)
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| What happens during beta - decay? | lose an electron, gain a proton, lose a neutron
--> no net change in mass number
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| What happens during beta + decay? | lose a positron, lose a proton, gain a neutron
--> no net change in mass number
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| What happens to neutron during beta-minus decay? | turns into a proton electron, and antineutrino
--> electron and antineutrino fly away to leave one more proton than original
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| What happens to proton during beta-plus decay? | proton turns into neutron, positron, and neutrino
--> positron and neutrino fly away to leave one more neutron than before
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| Does number of protons and neutrons change during beta minus/plus decay? | NO
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| Do any numbers change during gamma decay? | NO
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