Download Subatomic Particles

Survey
yes no Was this document useful for you?
   Thank you for your participation!

* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project

Document related concepts
no text concepts found
Transcript 
Subatomic Particles
Atomic Structure
Rutherford Experiment
Atom Terminology:
•
All atoms of an element have the same atomic number = number of protons
•
In a neutral atom (no charge), the number of positively and negatively charged particles must be
equal.
Number protons = number electrons
•
The mass number = protons + neutrons
•
Isotopes are atoms of an element with the same number of protons but different numbers of
neutrons, and different mass
Average Atomic Mass = weighted average of atomic mass of all atoms
all isotopes
Average atomic mass =

(fractional abundance)  (mass of isotope)
Example:
B has 2 isotopes: B-10: mass = 10.0129 amu
abundance = 19.91%
What is the average atomic mass of Boron?
B-11: mass = 11.0093
abundance = 80.09%
Related documents