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9 Cards in this Set

  • Front
  • Back
Define "elements".
Pure substances that cannot be broken down into simpler substances by chemical means.
Define "atomic number".
Number of protons in an atom.
Define "compounds".
Chemical substances composed of two or more elements chemically joined in a fixed ratio.
Define "nucleus".
The centre of the atom, containing protons and neutrons.
Define "electron cloud".
The region around the nucleus where electrons move.
Define "mass number".
Total number of protons and neutrons in the nucleus.
Define "isotopes".
Forms of an element that have a different number of neutrons.
Define "chemical bonds".
Forces of attraction between atoms that hold them together.
Define "subatomic particles".
Particles found inside atoms, such as protons, neutrons, and electrons.