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small center of the atom that contains protons and neutrons

electron cloud

the large volume of the atom that contains only electrons

atomic number

the number of protons in an atom.

hydrogen bonding

a bond between polar molecules such as water......oil is non polar


amount of matter


the attractive force that depends on gravity and mass


a substance with large heavy particles, a fixed shape and volume


a substance with some attraction between the particles , and a fixed volume but changeable shape


a substance with light particles and little or no attractive forces between them


substance particle with a positive charge


subatomic particles with a neutral charge and a mass of 1


subatomic particle with a negative charge and almost no mass

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