Atomic Attractions Slides Atomic Attractions
Why Atoms Stick Together
The Atomic Goal
The "Happy" Number: 8
Most atoms want a full outer shell of electrons.
Full = Stable
When an atom is full, it is calm and stops reacting.
Nucleus
Searching for 8!
What is Reactivity?
01
Reactive atoms are "lonely" or "restless." They have an incomplete outer shell.
02
They will STEAL or GIVE AWAY electrons to get to 8.
Example: Sodium (Na)
Sodium has only 1 outer electron. It is very unstable and ready to react!
Trading to be Stable
When atoms gain or lose electrons, they become IONS.
Cations
Atoms that LOSE an electron.
Now they have a Positive (+) charge.
Think: "Ca+ion" has a plus sign!
Anions
Atoms that GAIN an electron.
Now they have a Negative (-) charge.
Think: "A-Negative-Ion"
The Ionic Bond
Opposites Attract!
A Positive Cation and a Negative Anion pull toward each other like magnets.
The Result:
They stick together to form a Compound (like Salt!).
Na+
Cl-
Atomic Glue
Quick Review
Why react?
To get 8 electrons and be stable.
Ions
Charged atoms. (Plus or Minus)
Ionic Bond
Magnets! + and - stick together.
Atomic Attractions Notes Lab Notes: Atomic Attractions
Understanding how and why atoms stick together.
Name:
Date:
Part 1: The Basics
1. Most atoms want a full outer shell of _________________________.
2. The "Magic Number" for a stable outer shell is _________________________.
3. If an atom is reactive, it means it is _________________________ and searching for more electrons.
Part 2: The Charge
Cations
These atoms LOSE electrons.
Their charge is:
Hint: Ca+ion has a plus sign!
Anions
These atoms GAIN electrons.
Their charge is:
Hint: A-Negative-Ion
Part 3: Match the Magnet
Draw a line to match the term with its simplified definition.
Ionic Bond
Reactivity
Compound
Octet Rule
The goal of having 8 electrons
Two or more atoms stuck together
How much an atom wants to change
When + and - atoms attract
Part 4: Scientific Sketching
Magnesium (Mg) is a Positive Cation (+). Oxygen (O) is a Negative Anion (-). Show how they stick together in an ionic bond. Add labels!
Atomic Attractions Quiz UNIT REVIEW
Atomic Attraction Quiz
Name:
Read each question carefully. Circle the best answer.
1. Why do atoms react with other atoms?
To get bigger and heavier
To fill their outer shell with 8 electrons
To change their name
2. If an atom has a full outer shell, it is:
Very reactive and lonely
Unstable and ready to explode
Stable and calm
3. A "Cation" is an atom that has a ______________ charge.
Positive (+)
Negative (-)
Neutral (0)
4. An Ionic Bond happens because:
Atoms hate each other and push away
Opposite charges attract like magnets
Electrons are shared equally
5. Analyze the Image: Circle the correct answer.
A+
B-
Will these two atoms form an ionic bond?
YES
NO
Atomic Attractions Key Teacher Guide & Key
Atomic Attractions
Answer Key
Notes & Worksheet Key
Part 1: The Basics
1. ...outer shell of Electrons.
2. Magic Number is Eight / 8.
3. ...means it is Unstable / Unhappy / Lonely.
Part 2: Cations = Positive (+); Anions = Negative (-)
Part 3 Matching:
Ionic Bond → When + and - atoms attract
Reactivity → How much an atom wants to change
Compound → Two or more atoms stuck together
Octet Rule → The goal of having 8 electrons
Quiz Key
1. Why react? To fill their outer shell with 8 electrons
2. Full shell = Stable and calm
3. Cation = Positive (+)
4. Ionic Bond = Opposite charges attract like magnets
5. Will they bond? YES (Positive and Negative attract)
Modified Instruction Tips
Vocabulary Support
Emphasize the mnemonic for Cations (Ca+ion) and Anions (A Negative Ion). Repeat these several times with physical gestures (making a + with fingers).
Visual Aids
Use physical magnets during the presentation to demonstrate "Opposites Attract" when discussing Slide 5. It helps bridge the gap from abstract chemistry to concrete physics.
