Name _______________________________ Date __________________
SOL PS.3
1. According to modern atomic
theory, electrons are found
where?
5. Which particles can move from
one atom to another during a
chemical reaction?
A closely attached to the nucleus.
B in fixed orbits at well defined
distances from the nucleus.
C in totally random and varying orbits
around the nucleus.
D occupying unspecified regions
around the nucleus based on how
much energy each electron has.
A
B
C
D
protons
neutrinos
neutrons
electrons
6. Which particle has a negative
charge?
2. The nucleus of an atom is
composed of what particles?
A
B
C
D
A
B
C
D
7. The earliest atomic theory held
that atoms were:
protons and neutrons.
protons and electrons.
neutrons and isotopes.
electrons and neutrons.
3. The atomic number of an element
is equivalent to its:
A
B
C
D
number of valence electrons.
number of protons and neutrons.
number of protons.
number of neutrons.
4. Bohr’s model of the atom
proposed that:
A electrons move around the nucleus
in orbits.
B neutrons move around the nucleus.
C neutrons do not exist, but are just
paired protons and electrons.
D the nucleus spins.
proton
electron
neutron
negatron
A like a pudding with the electrons
randomly spread like raisins.
B fixed nuclei with the electrons in
fixed orbits
C like smooth, fixed billiard balls.
D a stew with the different subatomic
particles randomly floating around.
8. Which of the following statements
is true according to current
thinking?
A an atom is a collection of particles
so tightly packed that there is little
empty space
B the inside of an atom is mostly
empty space
C the atomic nucleus is very mobile
and moves around inside a cloud of
electrons
D the size of atoms changes over time,
pulsating from large to small to large
again.
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Copyright©1999,2000 S.S. Flanagan & D.E. Mott
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Do not reproduce without permission. 07-15-00