Set: Atomic Structure Vocabulary

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All 24 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.

Set Information

Terms 24
Creator wwilcox
Created November 28, 2007
Group Wilcox Science
Tags atoms, structure, atomic
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Description

This is the vocabulary set for the unit on atomic structure. You will be tested on this set of words.

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Most Missed Words

  1. Atoms → The smallest unit of an element. - 138 misses
  2. Isotopes → The term given to atoms of the same element that have different numbers of neutrons. - 126 misses
  3. Quarks → The particles that make up protons and neutrons. - 82 misses
  4. Transmutation → The process that occurs when an atom undergoes radioactive decay. - 81 misses
  5. Beta Particle → The term given to 'loose' electrons that come from radioactive decay. - 80 misses
  6. Mass Number → The total number of protons and neutrons in the nucleus of an atom. - 77 misses
  7. Alpha Particle → The term given to a particle consisting of two neutrons and two electrons, that comes from radioactive decay. - 77 misses