Chemistry Presentation

1
Chemistry Presentation

• By Matt McLain
• EDUC 295.01
• Dr. Streit
• September 24, 2002

2
Atoms

• Nucleus- center of the atom made up of protons
  and neutrons
• Protons- positively charged particles in the
  nucleus.
• Neutrons- particles with no charge found in the
  nucleus.
• Orbit- Tracks around the nucleus that the
  electrons follow.
• Electrons- negatively charge particles outside
  the nucleus.

3
Atomic Number and Mass

• Atomic Number- The number of protons inside the
  nucleus
• Atomic Mass- The sum of protons and neutrons in
  an atom.
• (protons neutrons)
• The number of neutrons does not always equal the
  number of protons

4
The Periodic Table of Elements
5
The Periodic Table of Elements

• The Rows are called Periods
• The columns are called Groups
• Some groups have special names that categorize
  them
• Group I- Alkali Metals
• Group II- Alkaline Earth metals
• Group VII- Halogens
• Group VIII- Noble gases

• Isotopes- Different combinations of neutrons for
  the same element.
• Examples
• C-12 Carbon 12 is elemental Carbon.
• C-14 Carbon 14 has a higher atomic mass then C-12
  and is less stable.

6
Compounds and Molecules

• Molecules- One or more elements that are
  chemically combined.
• H2O is an example of a molecule.
• Compound- One or more Molecules chemically
  combined.
• H2SO4 is an example of a compound.

7
I HOPE YOU ENJOYED MY PRESENTATION

• THE END