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12 Cards in this Set

  • Front
  • Back
covalent bond
when 2 stoms combine by sharing electrons.
*Their electron clouds join and the electrons circle both atoms, fulfilling both energy level unstabilities.
Why do atoms form bonds?
because their out energy lvels are not full. (first=2, second=8, third= sometimes 8)
ionic bond
when 2 or more atoms lose or gain electrons to have full energy levels (become stable). They donate an electron to another atom, giving themselves and the other atom a charge (since the number of protons and electrons aren't equal) The donation creates a strong bond between the elctrons involved. This is an ionic bond.
an atom that has an ionic bond with another and is therefore charged.
substance composed of 2 or more atoms of different elements joined by a chemical bond (covalent, ionic, etc.)
substances composed of one type of atom (depending on the # of protons in the nucleus)
the simplest form...90 naturally occurring ones!
the smallest particle of an element
electron cloud
region or space that electronsoccupy while moving around the nucleus
How is water formed?
when h2 and o2 react with heat, they speed up and end up colliding w/ more force within the given space. They end up rearrnge after the collision with 2 hydrgens to every one oxygen.
atoms of the same element, but a different amount of neutrons.
postively chraged ion
negativly charged ion