CHAPTER 4 Solidification and Crystalline Imperfections in Solids 4-1 Solidification of Metals • Metals are melted to produce finished and semifinished parts. • Two steps…
1. CONTENTS What is Radioactivity? Radioactive Nuclei 1) Strong Nuclear Force 2) Stability of Nucleus What are Radioisotopes? How many? How are they…
1. LecturePLUS Timberlake 1 Atomic Theory Atoms are building blocks of elements Similar atoms in each element Different from atoms of other elements Two or…
Slide 1Cosmology GREAT WEB RESOURCE: http://www.astro.ucla.edu/~wright/cosmolog.htm http://www.astro.ucla.edu/~wright/cosmolog.htm Contains a cosmological calculator A tutorial…
Slide 1SAMPLE EXERCISE 21.1 Predicting the Product of a Nuclear Reaction What product is formed when radium-226 undergoes alpha decay? Solution Analyze: We are asked to determine…
Slide 1The Nucleus Slide 2 Nuclear Stability and Radioactive Decay Atomic Number is the number of protons in the nucleus. Mass Number is the sum of the protons and neutrons.…
Slide 1 Slide 2 Creation of new elements is energy source of stars (and the sun) We are made of star stuff…. Carl Sagan Slide 3 The sun shines3.85e33 erg/s = 3.85e26 Wattsfor…