22 terms

Chemistry Atom test

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Atomic mass
Average number of protons and neutrons in an atom
Energy Levels
The area in atom that is outside the nucleus and has no charge
Neutron
Part of an atom that is in the nucleus but has no charge
Atomic number
The number of protons in an atom
Proton
Part of an atom that is responsible for much of the activity in an atom
Nucleus and Energy Levels
Atoms are divided into two main parts
J.J. Thompson
Used Cathode Ray Tube to discover the electron
Democritus
First person to discover the nucleus
Neutrons
Difference in mass of isotopes of the same element is due to different numbers of.....
Binding Energy
Amount of energy required to move neutrons or protons form the nucleus
Nucleon
Protons and neutrons, the particles that make up the nucleus of an atom
E=mc2
Formula that represents the binding energy of an atom
Mass Deficit
Difference between total mass and the individual nucleons in a nucleus and the nucleus as a whole
Spontaneous Fission
Occurs when atoms simply break into two smaller atoms without any outside help
Alpha Particles
Positive charge
Beta Particle
Negative charge
Gama Particle
No charge
Conduction
Form of the transfer of heat occurs primarily with solids
Radiation
Form of the transfer of heat does not require matter
Protons
Subatomic particle that must be removed or added to change the type of element an atom is classified as
Joules
Basic unit of measurement for energy
Electron
Part of an atom that is negatively charged and is not inside the nucleus
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