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18 Cards in this Set

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  • Back
electron
a negatively charged partical in an atom
proton
a positively charged partical in the nucleus of an atom
neutron
a particle in the nucleus of an atom that has no electric charge
atomic number
the number of protons in the nucleus of an atom of an element
chemical bond
a force, or link, that holds atoms together in a molecule or in a crystal
radioactive element
an element made up of atoms whose nuclei break down, or decay, into nuclei of other atoms
base
a compound that turns red lithmus paper blue and that forms an acid when it reacts with an acid
indicator
a substance that changes color when mixed with an acid or a base
chemical change
a change in matter that results in new substances with new properties
acid
a compound that turns blue lithmus paper to red and forms a salt when it reacts with a base
ion
an electrically charged atom
neutralization
the reaction between an acid and a base
nuclear fission
the splitting of the nucleus of an atom, releasing great amounts of energy
polymer
a compound consisting of large molecules formed from many smaller, linked molecules
model
something used or made to represent an object or idea
nucleus
the dense central part of an atom
Physical change
a change in the size, shape, or state of matter, with no new kind of matter being formed
salt
a compound that can be formed when an acid reacts with a base