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Atom - Coggle Diagram
Atom
History
Daltons Atomic Theory(1808)
Atoms are everything
Atoms of the same element are identical
Atoms can combine with other atoms in simple ratios
Chemical reactants change the atom, but not there identity
Democritus
First to suggest atoms as building blocks of matter
1700's
elements combine to create compunds
Law conservation of mass
Mass of reactant = mass of product
Mass can not be created or destrpyed
Ernest Rutherford
Found the Nucleus with the gold foil experiment
James Chadwick
Found the neutron in 1932
JJ Thompson
Found the electron with the oil drop experiment
Parts of the Atom
Protons
Positively charged molecules in the nucleus
neutrons
Neutral charged in the nucleus
Electrons
Negatively charges particles in the nucleus
Nucleus
Small, dense center of the Atom
Math of Atoms
Atomic Mass
weighted average of all the isotopes
Atomic number
Number of protons
Mass number
Protons +Neutrons
Isotopes
Same atomic number but with different mass numbers
laws
Law of multiple proportions
The same two elements can be in a compound but they must combine different ratios which are simple whole numbers.
Law of definite proportions
A compound always contains the same elements in the same proportions of mass.