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Ch 2 Inside the Atom
Explores to basic structure of an atom. Focus is on vocabulary.
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A
B
element
a substance that cannot be broken down into simpler substances
electron
negatively charged particles that surround the nucleus of an atom
proton
positively charged particles found in the nucleus of an atom
neutron
particle found in the nucleus of an atom that had no charge
electron cloud
region surrounding the nucleus that contains the electrons
atomic number
number of protons in the nucleus of an atom
isotopes
atoms of the same element with a different number of neutrons
mass number
is the number of protons and neutrons in the nucleus of an atom
radioactive decay
the release of nuclear particles and energy
half-life
the amount of time required for half of a sample of an element to decay
