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MrL Bio 6-1 vocab
ch. 6, section 1 vocabulary
12
Biology
10th Grade
10/05/2009

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Term
ionic bond
Definition
electrical attraction between 2 oppositely charged atoms or group of atoms
Term
covalent bond
Definition
chemical bond that forms when electrons are shared
Term
neutron
Definition
a particle, within an atom, that has no charge
Term
van der Walls forces
Definition
when molecules come close together, the attractive force between the positive and negative regions pull on the molecules, moving them together
Term
atom
Definition
building blocks of matter
Term
isotope
Definition
atoms of the same element that different numbers of neutrons
Term
compound
Definition
pure substances formed when two or more different elements combine
Term
nucleus
Definition
the center of the atoms where neutrons and protons are found
Term
element
Definition
pure substance that cannot be broken down into other substances by physical or chemical means
Term
ion
Definition
an atom that has lost or gained one or more electrons and therefore has a charge
Term
proton
Definition
particles within an atom that have a positive charge
Term
electron
Definition
negatively charged particles that are located outside the nucleus
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