EO 103 Foundations Matter: Anything that has mass and volume Mass: Amount of matter in an object Weight: Measure of the force of attraction between objects.
Catalyst – February 3(10)-7, 2010 Please place Progress Report Reflection Homework on your desk. What is a valence electron? What are the 3 subatomic.
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Elements, atoms, ions, and the periodic table. Right now our picture of the atom: protons (+1) and neutrons (()) in nucleus and electrons (-1) in region.
Activity 12 Major Concepts: Graphing is used to analyze and clarify data People make important personal and social decisions based on perceptions of benefits.
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Chemical Basis of Life A Review of Some of the Basic Chemical Principals.
Atoms & Elements. What is an atom? An atom is the smallest particle of an element that retains its identity in a chemical reaction. Word origin: atom.
Chemistry Unit Notes 8 th Grade Science Basic Vocabulary Matter: Anything that has mass and volume Mass: Amount of matter in an object Weight:
THE ATOM Chapter 6 – 2 Part 2. ISOTOPES Isotopes are atoms that have the same number of protons, but have different numbers of neutrons. Having a different.
Chapter 4 Structure of the Atom 4.3 How Atoms Differ.