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__(1)__, electrons, and neutrons can be
distinguished by mass, charge, and __(2)__.
Protons and neutrons have almost the same
__(3)__. Electrons have a charge that is equal in
size to, but the __(4)__ of, the charge of a
protons. __(5)__ have no charge. __(6)__ and
__(7)__ are found in the nucleus, but electrons
are found in the space outside the __(8)__.
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Atoms of different elements have different
numbers of __(1)__. The sulfur shown in the
figure is assigned atomic number __(2)__
because a sulfur atom has 16 __(3)__. You
can use atomic numbers to refer to
elements, like names and symbols because
each element has a unique __(4)__. Each
positive charge in an atom is __(5)__ by a
__(6)__ because atoms are __(7)__.
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Protons, __(1)__, and __(3)__ can be
distinguished by mass, __(3)__, and location
in an __(4)__. Protons and neutrons have
almost the same __(5)__. Electrons have a
charge that is equal in size to, but the
opposite of, the charge of a __(6)__.
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Identify the symbol, and amount of protons,
neutrons, and electrons for the following
atoms:
1) Neon
Mass Number = 20
2) Aluminum
Mass Number = 27
3) Potassium
Mass Number = 40
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1) What are the three subatomic particles?
2) Which two subatomic particles are in the
nucleus?
3) What is atomic number?
4) How do you find the mass number of an atom?
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Identify the symbol, and amount of protons,
neutrons, and electrons for the following
atoms:
1) Magnesium
2) Mercury
3) Zirconium
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1)
2)
3)
4)
5)
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What is the charge and location of a
proton?
What is the charge and location of an
electron?
What is the charge and location of a
neutron?
What information does the atomic number
give us?
How can we find the number of neutrons in
an atom?
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An __(1)__ can move from one energy level to
another when the atom __(2)__ energy. An
electron may move up two energy levels if it
gains the right amount of __(3)__. An
electron in a higher energy level may move
down if it __(4)__ the right amount of
__(5)__. The size of the jump between
__(6)__ determine the amount of __(7)__
gained or lost.
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Scientists must deal with the __(1)__ when
trying to predict the locations and motions of
__(2)__ in atoms. An __(3)__ cloud is a
visual model of the most likely locations for
electrons in an atom. The cloud is __(4)__ at
those locations where the probability of
finding an electron is __(5)__. Scientists use
the electron cloud model to describe the
__(6)__ locations of __(7)__ around the
nucleus.
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The __(1)__ number tells you the number of
__(2)__ in the atom’s nucleus. It does not
give you any information about the number
of __(3)__ in an atom. For that information,
you need to the atom’s __(4)__. The mass
number of an atom is the __(5)__ of the
protons and __(6)__.