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MTCES.8 -Sc.1.1.V

Vocab WordDefinition
matter anything that has mass and takes up space
element the simplest pure substance, can't be broken down into other substances
compound a substance of two or more elements that arre chemically combined in a specific ratio
mixture two or more substances (elements or compounds) that are mixed together but not chemically combined
atom the smallest part of an element
scientific theory a well tested idea that explains a wide range of data
model representation of an idea (mental, visual, ...)to help people understand a concept that is difficult to study directly
electrons negatively charged particles that revolve around the nucleus of an atom
nucleus the center of an atom, contains protons and neutrons
protons positively charged particles found in the nucleus of an atom
energy level the specific amount of energy in an electron
neutrons uncharged particles that reside in the nucleus of an atom
valence electrons the electrons with the highest energy level in an atom
electron dot diagram a diagram that shows you the number of valence electrons in an atom
chemical bond the force that holds atoms together after the rearrangement of electrons inbetween them
symbol an element's abbreviation
atomic number the number of protons and the number of electrons in an atom
period a row of elements in the periodic table, going across
group a column of elements in the periodic table, going down aka:family
family a column of elements in the periodic table, going down aka:group
noble gas group 18 of the periodic table, have 8 valence electrons
halogen element in group 17, have 7 valence electrons
alkali metal group 1 of the periodic table, have only 1 valence electron
ion an atom or group of atoms with an electric charge
polyatomic ions an ion made of sevral different atoms
ionic bond the attraction between two ions of opposite charges
ionic compound a compound made up of both positive and negative ions
chemical formula the combination of symbols that shows the ratio of a compound
subscript the ratio of elements in a compound
crystal an orderly three dimensional pattern of atoms or ions in a solid
covalent bond a chemical bond in which two atoms share electrons
molecule a neutral group of atoms with covalent bonds
double bond a covalent bond in which the atoms share two pairs of electrons
triple bond a covalent bond in which the atoms share three pairs of electrons
molecular compound a compound made of molecules
polar bond a covalent bond where electrons are shared unequally
nonpolar bond a covalent bond where electrons are shared equally
metallic bond the attraction between a positive metal ion and the loose electrons around it
alloy a material with metal-like properties made up of two or more elements
ductable can be bent and pulled easily, usually refers to a metal
malleable can be rolled into thin sheets, usually refers to a metal
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