BUILD
AN
ATOM
PART
I:
ATOM
SCREEN
Build
an
Atom
simulation
(http://phet.colorado.edu/en/simulation/build-an-atom)
1.
Explore
the
Build
an
Atom
simulation.
What
particle(s)
are
found
in
the
center
of
the
atom?
2.
Play
until
you
discover
which
particle(s)
determine(s)
the
name
of
the
element
you
build.
What
did
you
discover?
3.
What
is
the
name
of
the
following
atoms?
a) An
atom
with
3
protons
and
4
neutrons:
_____________
b) An
atom
with
2
protons
and
4
neutrons:
_____________
c) An
atom
with
4
protons
and
4
neutrons:
_____________
4.
Play
with
the
simulation
to
discover
which
particles
affect
the
charge
of
an
atom
or
ion.
a) Fill
in
the
blanks
below
to
show
your
results:
Neutral
atoms
have
the same number of
protons
and
electrons.
Positive
ions
have
________________________________
protons
than
electrons.
Negative
ions
have
_______________________________
protons
than
electrons.
b) Develop
a
relationship
(in
the
form
of
a
single
sentence
or
equation)
that
can
predict
the
charge
based
on
the
number
and
types
of
particle.
5.
6.
Play
with
the
simulation
to
discover
what
affects
the
mass
number
of
your
atom
or
ion.
a) What
is
a
rule
for
determining
the
mass
number
of
an
atom
or
ion?
Practice
applying
your
understanding
by
playing
1st
and
2nd
levels
on
the
game
screen.
10
MINUTES
RECORD
YOUR
SCORE
BUILD
AN
ATOM
7.
PART
II:
SYMBOL
SCREEN
Using
the
Symbol
readout
box,
figure
out
which
particles
affect
each
component
of
the
atomic
symbol.
a) In
the
atomic
symbol
below,
label
each
letter
(a,
b,
c,
and
d)
with:
the
particle(s)
used
to
determine
the
letter,
and
how
the
value
of
each
letter
is
determined.
d
c
8.
Create
a
definition
(using
a
complete
sentence)
for
each
of
these
items
based
on
your
labels
from
the
atomic
symbol
above.
a) Element
Symbol
b) Charge
c) Atomic
Number
d) Mass
Number
9.
Practice
applying
your
understanding
by
playing
the
3rd
and
4th
game
levels.
Play
until
you
can
get
all
the
questions
correct
on
the
4th
level.
Record
the
time
how
quickly
were
you
able
to
get
a
perfect
score
on
level
3
and
4
combined?
10. In
addition
to
atomic
symbol,
we
can
represent
atoms
by
name
and
mass
number.
a) Complete
the
table
below:
Symbol
12 +1
6
18
9
11
5
Name
Carbon-12
b) Each
representation
(Symbol
and
Name)
in
the
table
above
provides
information
about
the
atom.
Describe
the
similarities
and
differences
between
the
Symbol
and
Name
representations.
PART
III:
ISOTOPES
BUILD
AN
ATOM
11. Play
with
the
simulation
to
determine:
a) Which
particles
affect
the
stability
of
the
atom?
_____________________
b) Which
particles
do
not
affect
the
stability
of
the
atom?
_______________
12. What
are
the
names
of
the
stable
forms
of
oxygen?
a) Oxygen-16
b) Oxygen-____
c) Oxygen-____
d) List
all
of
the
things
that
are
the
same
about
these
atoms
(ignore
the
electrons).
e) List
all
of
the
things
that
are
different
about
these
atoms
(ignore
the
electrons).
13. The
atoms
in
the
previous
question
are
isotopes
of
each
other.
Based
on
this
information,
list
the
requirements
for
two
atoms
to
be
isotopes
of
each
other.
14. Test
your
understanding
of
isotopes
by
examining
the
relationships
between
the
pairs
of
atoms
listed
below:
Atom
1
Atom
2
Relationship
between
atom
1
and
atom
2
Isotopes
12
13
Same
Atom,
Not
Isotopes
of
Each
Other
6
6
Different
Element
Isotopes
12
Carbon-12
Same
Atom,
Not
Isotopes
of
Each
Other
6
Different
Element
Isotopes
Argon-40
Argon-41
Same
Atom,
Not
Isotopes
of
Each
Other
Different
Element
Isotopes
11
Boron-10
Same
Atom,
Not
Isotopes
of
Each
Other
5
Different
Element
An
atom
with
13
An
atom
with
14
Isotopes
protons
and
13
protons
and
13
Same
Atom,
Not
Isotopes
of
Each
Other
neutrons
neutrons
Different
Element
BUILD
AN
ATOM
EXERCISES
15. The
periodic
table
has
a
great
deal
of
information
about
every
atom.
Using
your
periodic
table,
answer
the
following
questions:
a) What
is
the
atomic
number
of
chlorine
(Cl)?
_____
b) What
is
the
atomic
number
of
tungsten
(W)?
_____
c) How
many
protons
are
there
in
any
Cl
atom?_____
d) How
many
protons
are
there
in
any
Te
atom?
_____
e) Can
you
tell
from
the
periodic
table
exactly
how
many
neutrons
are
in
an
atom?
16. Complete
the
following
table:
Name
hydrogen-
2
sodium-
22
carbon-12
carbon-13
carbon-14
carbon-12
carbon-12
argon-40
Symbol
Atomic
number
Mass
Number
Number
of
neutrons
Number
of
Electrons
Charge
2H
3H
22Na+
10
46Ti-2
107Ag
19F-1
4He
70Ga
70Ga+3
12
12
8
18
4
7
24
25
9
8
8
12
13
6
6
6
7
5
10
18
2
8
17. To
test
your
knowledge
of
isotopes,
draw
arrows
between
all
pairs
of
atoms
in
the
table
above
that
are
isotopes
of
each
other.
BUILD
AN
ATOM
