1. Modern Atom Model

2. Modern Atom Model
In 1911 Ernest Rutherford determined that atoms are mostly empty space with negatively charged electrons orbiting a positively charged nucleus.
1932 James Chadwick included protons and neutrons within the nucleus.

3. Modern Atom Model The modern atom model includes: Nucleus
Protons - Positively Charged particles
Neutrons - Neutrally Charged particles (no charge)
Electron Cloud
Electrons- Negatively charged particles

4. Modern Atom Model
Each type of atom or element has a unique number of protons, neutrons, and electrons.
For example:
Element
Proton
Neutron
Electron
Hydrogen 1
Helium 2
Lithium 3 4
Copper 29 35
Gold 79
118

5. Modern Atom Model
Determining the number of protons, neutrons, and electrons. And reading the periodic table.
Atomic number - the number of protons
Atomic mass - the number of protons and neutrons
Electrons - for our class will be the same as the protons

6. Modern Atom Model Let’s Practice:
Protons: _________ Protons: _________
Neutrons: ________ Neutrons: ________
Electrons: ________ Electrons: ________
Protons: _________ Protons: _________

7. Modern Atom Model
The periodic table is ordered by atomic number and grouped into families of similar elements.

8. Modern Atom Model Snowflake atom activity instruction
Gather materials: scissors, snowflake template, cardstock, glue, and colored pencils.
Fold the template.
Cut out the atom template.
Glue the snowflake atom model to the card stock.
Determine the element.
Label and color the protons, neutrons, and electrons.
Include the charge of each particle.
Name
Element Name
Key
Protons
Neutrons
Electrons