1_Structure of the - Structure of the atom The ancient Greeks were the first to postulate that matter consists of indivisible constituents Later

Info iconThis preview shows pages 1–8. Sign up to view the full content.

View Full Document Right Arrow Icon
Structure of the atom The ancient Greeks were the first to postulate that matter consists of indivisible constituents. Later scientists realized that the atom consisted of charged entities. EARLY 1900s CRT (Cathode Ray Tubes) JJ Thompson 1. Rays are same no material what material is used to generate them. 2. Rays are stream of negatively charged particles. Charge of electron determined later by Milliken
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Structure of atom J.J. Thompson’s interpretation: cookie dough model Studies of radioactivity: matter is composed of negative, positive and neutral material
Background image of page 2
Structure of Atom ~1910 Earnest Rutherford tested Thompson’s Model
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Nuclear Atom Rutherford concludes: massive nucleus with electrons orbiting around it.
Background image of page 4
Modern View of atom • An atom is almost entirely empty space. 1nm = 10 -9 m 10 Å = 1nm Å = angstrom Atom Diameter = 0.1-0.5 nm Nuclear diameter = 10 -5 nm Ratio of nuclear size to atomic radius: 10 -4 Carbon atom diameter = 0.154 nm
Background image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Modern View of Atom COMPONENTS OF ATOMS mass charge (a.m.u.) (a.u.) proton p ~ 1 + 1 electron e ~ 0 1 neutron n ~ 1 0 Neutral Ion + K 39 19 F 19 9
Background image of page 6
ISOTOPES • Number of protons = atomic number • DEFINES identity of element For a given element, number of protons
Background image of page 7

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 8
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 04/16/2009 for the course CHEM 110 taught by Professor Hofmann,brucerob during the Fall '08 term at Pennsylvania State University, University Park.

Page1 / 17

1_Structure of the - Structure of the atom The ancient Greeks were the first to postulate that matter consists of indivisible constituents Later

This preview shows document pages 1 - 8. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online