Chapter 3: Chemical Formulae and Equations 3.1 Relative Atomic Mass and Relative Molecular Mass.
1 Announcements & Agenda (01/19/07) You should currently be reading Ch 3 & starting Ch 4, which will be relevant to lab next week Today: More on Subatomic.
1 2.3-2.5 Isotopes and Atomic Weighs 24 Mg 25 Mg 26 Mg 12 12 12 Copyright © 2005 by Pearson Education, Inc. Publishing as Benjamin Cummings Chapter 2 Atoms.
1 Chapter 3Atoms and Elements 3.6 Isotopes and Atomic Mass 24 Mg 25 Mg 26 Mg 12 12 12 Copyright © 2005 by Pearson Education, Inc. Publishing as Benjamin.
1 Announcements & Agenda (01/22/07) You should currently be reading Ch 4! Quiz on Wednesday over Ch 3! Today: Radiation (Ch 9 – only responsible for notes)
What Makes up Living Things? What makes up Water? What makes up Carbon Dioxide, Oxygen, etc.
ISOTOPES Chemistry. I. Why Atoms Differ? A. Atoms of different elements have their own unique structures 1. Because they have different structures they.
Warm Up: 3/1/13 1) What 2 pieces of information can you identify from a chemical formula? (Ex: H2O) 2) What is the name for the number written to the lower.
All the materials known to man are composed of 92 elements
Chapter 20
What is a Symbol?
