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michelleroberts
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Molecule
- neutral particle formed when atoms share electrons
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Nucleus
- center fo the atom that contains the protons and neutrons
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Subscript
- A number that is written a little below of text. Shows the number of particular element in a chemical formula.
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coefficient
 The number in front of some chemical formulas. An example would be the 3 in 3 NaCl
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Compound
- Pure substance contining 2 or more elements that are chemically bounded.
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chemical formula
- shows the kind and number of ataoms in a formula
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electron cloud
space around the nucleus where electrons can be found 
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electron dot diagram
- symbol for the element surrounded by as many dots as there are electrons in its outer level
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energy levels
- different areas in the electron cloud where an electron can be found
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Ion
- an atom that is no longer neutral because it has gained or lost an electron
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chemical bond
force that holds two atoms together 
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covalent bonds
- when atoms share electrons
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double bond
- when 2 pairs of electrons are involved in a covalent bond
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ionic bond
- Attraction which holds ions close together. Bond where electrons are gained or lost
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Metallic Bonds
WHen metal atoms share their pooled neutrons
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Polar Bond
Bond in which electrons are shared unevenly
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Triple bond
- When 3 pairs of electrons are shared by 2 atoms
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Valence Electrons
- The electrons in the outer energy level. The electrons that determine how elements react
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Polar Molecule
Molecule where electrons are shared unevenly
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Nonpolar Molecular
Molecule where electrons are shared evenly
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