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All 40 Terms

Term Definition
Atoms The smallest unit of an element.
Subatomic A term that means 'smaller than an atom'.
Nucleus The center of an atom.
Proton A positively charged subatomic particle.
Neutron A subatomic particle with no charge
Electron A negatively charged subatomic particle.
Particle a very small piece of something
Electron Cloud Empty space around the nucleus of an atom where electrons travel
Thomson The man who discovered the electron.
Rutherford The man who discovered the nucleus of an atom.
Gold Foil Experiment The experiment conducted by Ernest Rutherford to discover the nucleus of an atom.
Quarks The particles that make up protons and neutrons.
Mass Number The total number of protons and neutrons in the nucleus of an atom.
Isotopes The term given to atoms of the same element that have different numbers of neutrons.
Transmutation The process that occurs when an atom undergoes radioactive decay.
Half-life In atoms that are radioactive, the time required for half of the element to decay.
Decay To break into smaller pieces.
Atomic Number The number of protons in an atom.
Cathode Ray Tube A Piece of Equipment used by Thomson to discover the electron.
Bohr The man who discovered electron energy levels.
Electron Cloud Model The current model for atomic structure.
Beta Particle The term given to 'loose' electrons that come from radioactive decay.
Alpha Particle The term given to a particle consisting of two neutrons and two electrons, that comes from radioactive decay.
Element A form of matter that cannot be separated into simpler substances by ordinary chemical methods.
period A row of elements in the periodic table whose properties change gradually and predictably.
transition elements Elements in the middle of the periodic table, in groups 3-12.
metal An element that has luster, is a good conductor of heat and electricity, is malleable, and is ductile.
malleable The ability to be made into thin sheets.
ductile The ability to be stretched into wires.
nonmetals Elements which are not ductile, not malleable, do not have luster, and are poor conductors of electricity.
metalloid An element that shares some characteristics of metals and some of nonmetals.
alkali metals The name of the family of elements in Group 1.
alkaline earth metals The name of the family of elements in Group 2.
halogens The name of the family of elements in Group 17.
noble gases The name of the family of elements in Group 18.
the iron triad The name given to iron, cobalt, and nickel, collectively.
rare earth elements The 'inner-most' elements, which are usually placed at the bottom of the periodic table.
lanthanide series The 15 elements including and immediately following lanthanum.
actinide series The 15 elements including and immediately following actinium.
luster The ability to reflect light.

Set Information

Terms 40
Creator wwilcox
Created January 14, 2008
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Description

This is the combined Atomic Structure/Periodic Table set that you will be quizzed on, on Tuesday, January 15th.

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Most Missed Words

  1. Atoms → The smallest unit of an element. - 85 misses
  2. Element → A form of matter that cannot be separated into simpler substances by ordinary chemical methods. - 62 misses
  3. metalloid → An element that shares some characteristics of metals and some of nonmetals. - 47 misses
  4. rare earth elements → The 'inner-most' elements, which are usually placed at the bottom of the periodic table. - 45 misses
  5. transition elements → Elements in the middle of the periodic table, in groups 3-12. - 42 misses
  6. Beta Particle → The term given to 'loose' electrons that come from radioactive decay. - 40 misses
  7. alkaline earth metals → The name of the family of elements in Group 2. - 39 misses