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Mastery Quiz
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1Much of the evidence for the existence of atoms comes from
A)chemistry
B)mechanics
C)biology
D)thermodynamics



2The discovery of the conservation of mass in chemical reactions was made by
A)Bohr
B)Heisenberg
C)Lavoisier
D)Newton
E)Rutherford



3Molecules are
A)subdivisions of atoms
B)several atoms bound together
C)the same as electrons
D)the same as nuclei



4The arrangement of the elements according to their chemical properties and atomic weight is called the .



5Alpha particles
A)have no charge
B)are the same as electrons
C)are the same as helium ions



6Beta particles
A)have no charge
B)are the same as electrons
C)are the same as helium ions



7Photons are
A)positively charge
B)negatively charge
C)uncharged, particle-like bundles of energy



8The relationship between energy and frequency for an electromagnetic wave proposed by Planck and Einstein is
A)E = h/f
B)E = h f
C)E = f/h
D)E = h f2



9The Bohr model of the atom states
A)electrons can have any orbit about the nucleus
B)electrons are contained in the nucleus
C)electrons are uniformly distributed throughout the atom
D)electrons can orbit the nucleus only in certain stable orbits



10The De Broglie wavelength of a particle is calculated from the momentum as
A)λ = h/p
B)λ = p/h
C)λ = hp
D)λ = hp2







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