September 23rd
Section 3.8: The Bohr Model (continued)
Models: useful ways of thinking of things, can aid our understanding, but
not necessarily what is really going on.
Electrons go into distinct shells in the atom.
The higher the shell number, the further away from the nucleus the
shell is. This means that the shell you are adding electrons to is always
the outermost shell. This is important.
Models: useful ways of thinking of things, can aid our understanding, but
not necessarily what is really going on.
Electrons go into distinct shells in the atom.
- The first two electrons go into the 1st shell
- The next eight electrons go into the 2nd shell
- The next eight electrons go into the 3rd shell
- The next eight electrons* go into the 4th shell
The higher the shell number, the further away from the nucleus the
shell is. This means that the shell you are adding electrons to is always
the outermost shell. This is important.
Section 3.11: Moles
1 mole = 6.022 x 1023 [something]
Unit for atoms & molecules.
Abbreviation of "mole" or "moles": "mol"
1 mole of some element's atoms = [atomic mass] grams
Molar mass: grams / mol
Can use molar mass to calculate number of moles from mass or vice versa
1 mole = 6.022 x 1023 [something]
Unit for atoms & molecules.
Abbreviation of "mole" or "moles": "mol"
1 mole of some element's atoms = [atomic mass] grams
Molar mass: grams / mol
Can use molar mass to calculate number of moles from mass or vice versa