Chemistry Quarter 1 EXAM-Graded A
Electron - correct answer-A subatomic particle that has a negative charge
proton - correct answer-A subatomic particle that has a positive charge and that is found
in the nucleus of an atom
ion - correct answer-An atom or group of atoms that has gained or lost one or more
electrons, thus acquiring a charge.
isotope - correct answer-Atoms of the same element that have different numbers of
neutrons
significant figures - correct answer-All the digits that can be known precisely in a
measurement, plus a last estimated digit
atomic mass - correct answer-Number of protons and neutrons
atomic number - correct answer-Number of protons
homogenous mixture - correct answer-A mixture that is so evenly mixed that the
different parts cannot be differentiated simply by looking at them.
heterogenous mixture - correct answer-Is a substance in which its different components
and easily distinguished
compound - correct answer-A pure substance made of two or more elements chemically
combined
mixture - correct answer-(chemistry) a substance consisting of two or more substances
mixed together (not in fixed proportions and not with chemical bonding)
rutherfords gold foil experiment - correct answer-showed that atoms are mostly empty
space but have a massive, positively charged nucleus
daltons theory - correct answer-1) elements are composed of atoms. 2) atoms of same
element are identical, but differ from other elements. 3) elements can mix together 4)
atoms only change when mixed with other elements
bohr - correct answer-Bohr proposed that an electron is found only in specific circular
paths, or orbits around the nucleus
Electron - correct answer-A subatomic particle that has a negative charge
proton - correct answer-A subatomic particle that has a positive charge and that is found
in the nucleus of an atom
ion - correct answer-An atom or group of atoms that has gained or lost one or more
electrons, thus acquiring a charge.
isotope - correct answer-Atoms of the same element that have different numbers of
neutrons
significant figures - correct answer-All the digits that can be known precisely in a
measurement, plus a last estimated digit
atomic mass - correct answer-Number of protons and neutrons
atomic number - correct answer-Number of protons
homogenous mixture - correct answer-A mixture that is so evenly mixed that the
different parts cannot be differentiated simply by looking at them.
heterogenous mixture - correct answer-Is a substance in which its different components
and easily distinguished
compound - correct answer-A pure substance made of two or more elements chemically
combined
mixture - correct answer-(chemistry) a substance consisting of two or more substances
mixed together (not in fixed proportions and not with chemical bonding)
rutherfords gold foil experiment - correct answer-showed that atoms are mostly empty
space but have a massive, positively charged nucleus
daltons theory - correct answer-1) elements are composed of atoms. 2) atoms of same
element are identical, but differ from other elements. 3) elements can mix together 4)
atoms only change when mixed with other elements
bohr - correct answer-Bohr proposed that an electron is found only in specific circular
paths, or orbits around the nucleus
