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ILS Atoms 2013

Atoms and Radioactivity

QuestionAnswer
Charge of proton positve
charge of electron negative
charge of neutron neutral
location of neutron in the nucleus
location of proton in the nucleus
location of electron orbiting the nucleus in the electron cloud
Atomic mass unit (amu) mass of about a proton
Atomic mass figured from the average of the mass of the isotopes of that element (protons and neutrons)
Atomic number number of protons in an atom
How is an isotope named? based on the number of protons and neutrons in the isotope
Main force that holds the nucleus together strong force
force that repels likes and attracts opposites electromagnetic force
force that is responsible for radioactive decay weak force
charge of the nucleus positive
What controls what the element is? number of protons
How do you find the neutron number in an atom? mass number minus atomic number
Niels Bohr's model of an atom electrons are like planets orbiting the sun around the nucleus
Electron cloud model tells us likely locations of the electron through probability
Atoms nucleus like a marble on home plate of a baseball diamond
Radioactivity unstable nucleus emits charged particles
Radioactive decay changes the element
Gamma radiation produces energy instead of a particle
Half life time it takes for half of the radioactive nuclei to decay
which is greater over short distances? Strong or electromagnetic force strong
Valence electrons found on the outside energy levels
isotopes created by adding neutrons or taking them away
ion atoms that are positvely or negatively charged by adding or taking away electrons
Be able to model an isotpe electron rings 2, 8, 18, 32
Alpha decay two protons and two neutrons lost
beta decay neutrons turn into protons by losing electron or positron
gamma radiation photons of energy emitted from nucleus
Created by: evroman
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