Chemistry Test 2 Flashcards
(30 cards)
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
