Revision on chapter 3 and chapter 9= chemistry
Unit II : Atoms, Molecules, Ions and Nuclear Chemistry.
I. Structure of the Atom The Early Models of the Atom.
MODELS OF ATOMS ÞDemocritus(400 B.C): said that matter is composed of indestructible particles. He called them atoms, a Greek word which means indestructible.
Atoms, Elements, Compounds, and Ions Atom basic building block of all matter Element Substance that consists of only one type of atom. Molecule has two.
Atomic Masses & the MOLE…. Neon is a gas that can be found in the atmosphere.Neon is a gas that can be found in the atmosphere. –Dry air contains about.
Atomic Masses & the MOLE…. Masses of atoms expressed in grams are extremely small.Masses of atoms expressed in grams are extremely small. –An atom of.
Warm-up Spiral Write or read over your summary for the notes on “Describing Chemical Reactions” (Pgs. 544 – 548) If you were absent, begin to write notes.
Chapter 2 Atoms, Molecules and Ions The Early History of Chemistry Before 16 th Century Greeks were the first to attempt to explain why chemical changes.
Copyright©2000 by Houghton Mifflin Company. All rights reserved. 1 The Early History of Chemistry 4 Before 16th Century – Alchemy: Attempts (scientific.
The origin of life Goals The fossil record for very early life Chemical evolution—amino acids to DNA The advance of life Cambrian Explosion 1.
3-3: Counting Atoms Beaker Breaker 1.What was the name of Rutherford’s experiment? 2.What did Rutherford’s experiment discover? 3.My atomic number is.
