JUST LIKE SOLAR SYSTEM..........

MODERN ATOMIC MODEL
By James Chadwick

SUBATOMIC :

PROTON (+)
NEUTRON (no charge)
Both located in nucleus

ELECTRON (-)
Round nucleus at certain orbit

RELATIVE MASS OF :

PROTON - 1
NEUTRON -1
ELECTRON -1/1840
almost 0

FRACTIONAL DISTILLATION

Fractional distillation is the separation of a mixture into its component parts, or fractions, such as in separating chemical compounds by their boiling point by heating them to a temperature at which several fractions of the compound will evaporate.