Electron Shells (1) Flashcards
Electrons always occupy __________
Shells
The ____________ energy levels are always filled first - these are the ones closest to the _____________
Lowest
Nucleus
How many electrons are allowed in the first shell
2
How many electrons are allowed in the second shell
8
How many electrons are allowed in the third shell
8
Atoms are much happier when they have _______ electron shells - like the noble gases in group ___
Full
0
The number of electrons in the outer shell is represented by the __________ that the atom is in
Group
The number of shells that the atom has is represented by the _____________ that the atom is in
Period
The number of electrons that the atom has is represented by the _________ number
Atomic (below)