Modeling Isotopes
What is an isotope?
An isotope is…
ISOTOPE Model #1
Using the Bohr’s Model “target” and plastic chips…
1. Place 3 red protons in the nuclear region.
2. Place 4 green neutrons in the nuclear region.
3. Place 3 blue electrons in the energy shells (Remember, start with 2 maximum in the K shell, then
up to 8 maximum in the L shell, and then 18 maximum in the M shell)
You have successfully built a model of a neutrally charged Lithium atom. Now remove 1 green neutron
from the nucleus.
Q1. What atom have you modeled?
Q2. What is the atomic mass?
Q3. Draw the model you have created
Q4. Label the model correctly with its isotope notation.
ISOTOPE Model #2
Clear all the plastic chips from the Bohr’s Model “target”…
1. Place 12 red protons in the nuclear region.
2. Place 12 green neutrons in the nuclear region.
3. Place 12 blue electrons in the energy shells (Remember, start with 2 maximum in the K shell,
then up to 8 maximum in the L shell, and then 18 maximum in the M shell)
You have successfully built a model of a neutrally charged Magnesium atom. Now remove 2 green
neutrons from the nucleus.
Q1. What atom have you modeled?
Q2. What is the atomic mass?
Q3. Draw the model you have created
Q4. Label the model correctly with its isotope notation.
ISOTOPE Model #3
Clear all the plastic chips from the Bohr’s Model “target”…
1. Place 16 red protons in the nuclear region.
2. Place 16 green neutrons in the nuclear region.
3. Place 16 blue electrons in the energy shells (Remember, start with 2 maximum in the K shell,
then up to 8 maximum in the L shell, and then 18 maximum in the M shell)
You have successfully built a model of a neutrally charged Sulfur atom. Now add 1 green neutron to the
nucleus.
Q1. What atom have you modeled?
Q2. What is the atomic mass?
Q3. Draw the model you have created
Q4. Label the model correctly with its isotope notation.
ISOTOPE Model #4
Clear all the plastic chips from the Bohr’s Model “target”…
1. Place 6 red protons in the nuclear region.
2. Place 7 green neutrons in the nuclear region.
3. Place 6 blue electrons in the energy shells (Remember, start with 2 maximum in the K shell, then
up to 8 maximum in the L shell, and then 18 maximum in the M shell)
You have successfully built a model of a neutrally charged Carbon atom. Now add 2 green neutrons to
the nucleus.
Q1. What atom have you modeled?
Q2. What is the atomic mass?
Q3. Draw the model you have created
Q4. Label the model correctly with its isotope notation.