ENME382 S2010 0201 ch02

ENME382 S2010 0201 ch02 - CHAPTER 2: ATOMIC STRUCTURES AND...

Info iconThis preview shows pages 1–7. Sign up to view the full content.

View Full Document Right Arrow Icon
ISSUES TO ADDRESS. .. What promotes bonding? CHAPTER 2: ATOMIC STRUCTURES AND BONDING Chapter 2 - ENME 382 Spring 2010 Section 0201 1 What types of bonds are there? What properties are inferred from bonding?
Background image of page 1

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

View Full DocumentRight Arrow Icon
Atomic Structure (Freshman Chem.) • atom – electrons – 9.11 x 10 -31 kg protons neutrons • atomic number Z = # of protons in nucleus of atom = # of electrons of neutral species etermines its osition in periodic table } 1.67 x 10 -27 kg Chapter 2 - ENME 382 Spring 2010 Section 0201 2 determines its position in periodic table • A [=] atomic mass unit = amu = 1/12 mass of 12 C Atomic wt = wt of 6.022 x 10 23 molecules or atoms 1 amu/atom = 1g/mol C 12.011 H 1.008 etc.
Background image of page 2
Atomic Structure • Valence electrons determine all of the following properties 1) Chemical 2) Electrical Chapter 2 - ENME 382 Spring 2010 Section 0201 3 3) Thermal 4) Optical
Background image of page 3

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

View Full DocumentRight Arrow Icon
Electronic Structure Bohr model -electron orbitals & quantized energy levels (bonding • Wave-mechanical model lectrons ave wavelike and Chapter 2 - ENME 382 Spring 2010 Section 0201 4 – Electrons have wavelike and particulate properties. – This means that electrons are in orbitals defined by a probability. – Each orbital at discrete energy level is determined by quantum numbers .
Background image of page 4
Quantum Numbers Principal quantum number, n (energy level-shell) number or letter (K, L, M, N) 2nd quantum number, l electron subshell shape of electron orbitals (s, p, d, f) Chapter 2 - ENME 382 Spring 2010 Section 0201 5 3rd quantum number Number of energy states number of electrons (2, 6, 10 or 14) 4th quantum number electron spin - up or down Not all states are equal (especially in presence of a magnetic field) - Molecular Orbital Theory - bonding …. Useful in characterization & properties - especially in more advanced classes)
Background image of page 5

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

View Full DocumentRight Arrow Icon
Electron Energy States 3 d 4 p 4 d N -shell n = 4 have discrete energy states tend to occupy lowest available energy state. Electrons.
Background image of page 6
Image of page 7
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 01/24/2011 for the course ENME enme382 taught by Professor Bruck during the Spring '10 term at Maryland.

Page1 / 24

ENME382 S2010 0201 ch02 - CHAPTER 2: ATOMIC STRUCTURES AND...

This preview shows document pages 1 - 7. Sign up to view the full document.

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