Atomic theories and Valence Electrons. Atomic Theories. Dalton thought that atoms were like smooth, hard balls that could not be broken into smaller pieces. Atomic Theories. Thomson suggested that atoms had negatively charged electrons embedded in a positive sphere. Atomic Theories.
Bohr Model- Everything moved around nucleus
Atom mostly empty space
Rutherford was surprised that a few particles were deflected strongly. This led him to propose an atomic model with a positively charged nucleus.
Cloud Model- 1920’s
Electrons move rapidly every which way
has been seen with hydrogen and calcium)
(usually 1 or 2 valence e-)
Yes ,this is Gilbert Lewis
Would be the bonding enforcers of the atom world