Chemistry Test 2
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What was Democritus’ year?
460 BCE
What did Democritus think about?
Thinks about atoms
What was John Dalton the father of?
The modern atom structure
John Dalton stated?
-states All matter is made of atoms. atoms are indivisible and Indestructible -all atoms are Identical in mass and properties -Compounds are formed by a combination of two or more different kinds of atoms
Joseph John (JJ) Thomson (1897) did what?
-Discovered the electron -came up with the plum Pudding model of the atom -Gold foil experiment -discovered nucleus and that was the nucleus was positive -planetary model
Neils Bohr
-Adjusted Rutherford’s Model -electrons could move only in fixed orbits of specific energies
Werner Heisenberg
Adjusted Bohr’s model into modern model of the Adam.
Erwin Schrödinger (1926)
• Electron location - electron clouds
Henri Becquerel
• Discovered natural radiation - uranium on photo plate
Robert minken
Discovered Electron Charge by using oil drop experiment
Where is a proton located?
Nucleus
What is a protons mass?
1.673 x 10^-27
What is the relative mass of a proton?
1
What does a proton do?
IDs the atom
what is a neutrons mass?
1.675 x 10^-27
What is a neutrons relative mass?
1
What are extras about a neutron?
Isotopes stabilizes the nucleus
What is the mass of an electron?
9.109 x 10^-31
What is the relative mass of an electron?
0
What are extras are on electrons?
Charge bonding
What are isotopes?
Atoms of the same element with different mass numbers
What is average atomic mass formula?
[(Mass)(%)+(mass)(%)]/100
Binding energy is?
Energy released when a nucleus is formed from nucleons
What is Fusion
Combining at two nuclei to form one nucleus of larger mass