Lecture 6 - Atoms and the Periodic Table Flashcards
1
Q
mass (g) of a proton
A
1.6726 x 10^-24
2
Q
mass (g) of a neutron
A
1.6749 x 10^-24
3
Q
mass (g) of an electron
A
9.1093 x 10^-28
4
Q
What is the Angstrom scale?
A
10^-10 m - 10th of a nanometer
5
Q
What is Atomic Weight?
A
a weighted average based on how often you can see an isotope in nature
6
Q
What is the equation to find atomic weight?
A
1 x % = ?
2 x % = ?
? + ? = atomic weight
(1 and 2 being different isotopes)
7
Q
what is mass number (a)?
A
the number of protons + the number of neutrons
