Ions and Isotopes Activity

WNHS Chemistry Name______Per____ ACTIVITY: Atoms, Ions & Isotopes Part I: What is an Ion?

Protons have a ______charge. Electrons have a ______charge. Neutrons have a ______charge.

An ion is .

Example: Lithium Atom Lithium Ion : Li+1

# p # p ______

# n # n ______

# e # e __

Charge ____ Charge

Electron Lost --

Example: Fluorine Atom Fluorine Ion: F-1

# p # p ______

# n # n ______

# e # e __

Charge ____ Charge

Electron Gained-- Part II: What is an Isotope?

Protons have a mass of ___ . Electrons have a mass of ___ . Neutrons have a mass of ____

An isotope is ______.

Example: Most Common Carbon Isotope Carbon Isotope: 14 C

# p # p ______

# n # n ______

# e # e __

Atomic Mass ____ Atomic Mass

Neutrons added --

Example: Most Common Sulfur Isotope Sulfur Isotope: 35S

# p # p ______

# n # n ______

# e # e __

Atomic Mass ____ Atomic Mass

Neutron added --

Part III: Atom in a Dish

1. Around the room are atoms! You will go to each station and discover if it is an Atom, Ion or and uncommon Isotope.

2. Go to a station (be sure to start writing on your paper where you actually started) Record the number of protons, neutrons and electrons for each bag in the following data table. PLEASE DO NOT OPEN THE DISHES! 3. Using the data, complete the rest of the columns using that data. Be sure to calculate your mass number. # of # of # of Mass Element Element Full Atomic Protons Neutrons Electrons Number Symbol Symbol 1

Conclusion: 1. Which number did you use to tell you which element it was? ______

2. Which dishes represent Isotopes? Why? (please write the matching station numbers)

3. Which dishes represent Ions? Why?

4. Which dishes represent atoms? Why? Remember the definition of ATOMS! Part IV: Ion Chart Complete the chart information of the following ions:

Atomic Atomic Ion Number of Number of Element Symbol Number Symbol Protons Electrons

Sodium Na 11 Na+1

Potassium 19 18

Cl 17 Cl-1

Bromine 35 36

Be Be+2 Oxygen 8 10

Al Al+3 Phosphorus 15 18

Part V: Isotope Chart Complete the chart information of the following isotopes: Number of Most Common Number of Neutrons Number of of Most Common Given Isotope Element Protons Isotope (Mass Neutrons Number from PT) Isotope in Given Isotope carbon-14

nitrogen-15

sulfur-35

20 -45

iodine- 78

92 238 235

19 21 Key Key Protons = large red beads Protons = large red beads Neutrons large blue beads Neutrons large blue beads Electrons = small green beads Electrons = small green beads

Key Key Protons = large red beads Protons = large red beads Neutrons large blue beads Neutrons large blue beads Electrons = small green beads Electrons = small green beads