1. Chemistry The structure, composition and properties of matter
Three phases – gas, liquid, solid
Plasma is considered a fourth phase

2. What is an Atom?
The smallest unit of an element that has the chemical properties of that element.

3. What is an Element?
A substance made from only one type of atom with a unique set of chemical and physical properties.
All matter is made of one type or a combination of types of elements.

4. What is the Periodic Table?
A table that organizes elements by their properties

5. Parts of an Atom
Nucleus –center of atom containing protons and neutrons
Electron Cloud – outer part of the atom containing the
orbiting electron

6. Subatomic Particle Chart
Location
Mass (AMU)
Charge
Protons
Neutron
Electron

7. Well, what if I do break down an atom?
Proton- subatomic particle with a positive charge, mass of 1amu
Neutron- subatomic particle with a NO charge, mass of 1amu
Electron- subatomic particle with a negative charge, almost no mass.

8. What numbers do we use to describe properties of atoms?
The Atomic Number and the Atomic Mass Number
Atomic Number- Number of Protons, if you change the # of protons you change the element.
Mass Number- # of Protons + # of Neutrons
Number of electrons equals the number of protons for an atom that does not have a charge!!!
Element Symbol
Name of Element
Mass Number

9. Proton, neutron and electron Numbers
Element
# Protons
# Neutorns
# Electrons F I Hg Es

10. What can/can’t change about an atom of an element.
# of protons can’t change, or you change to a new element. The # of protons is the unique atomic number for each element.
If you could somehow add a proton to carbon its atomic number would now be 7 and it would be Nitrogen

11. What can/can’t change about an atom of an element.
# of neutrons can change. Since they have no charge it does effect the atom’s charge, but does increase or decrease total mass by 1 amu for each neutron. If neutrons are added/taken away we call these isotopes.

12. Isotopes

13. Hydrogen Isotopes Isotope # of Protons # of Neutrons Mass # Protium
Deuterium
Tritium

14. Why does Hydrogen have a Mass of 1.008…..?
It is the average mass of the isotopes based on the relative abundance of each isotope

15. What can/can’t change about an atom of an element.
# of electrons can change. Adding electrons to an atom creates a negative charge, and taking electrons away from an atom increases gives it a positive charge.

17. Fill in Electron Shells 2/8/8
Chlorine

18. See additional note sheet
Electron Energy Level
See additional note sheet

19. Visual Overview of Atoms

20. Periods
Elements in the same period have the same number of atomic orbitals (electron cloud)

21. Groups The Columns in the Periodic Table
Number of electrons in outer shell
Transition metals are drawn
Group 1 has one electron in outer shell
How many in Boron?

22. Take out your iPads…
Download the app…Nova Elements