Flashcards in Chemistry Test 2 Deck (30):
What did Democritus think about?
Thinks about atoms
What was Democritus' year?
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
-Adjusted Rutherford's Model
-electrons could move
only in fixed orbits of specific energies
Adjusted Bohr's model into modern model of the Adam.
Erwin Schrödinger (1926)
-Discovered natural radiation
-uranium on photo plate
Discovered Electron Charge by using oil drop experiment
Where is a proton located?
What is a protons mass?
1.673 x 10^-27
What is the relative mass of a proton?
What does a proton do?
IDs the atom
what is a neutrons mass?
1.675 x 10^-27
What is a neutrons relative mass?
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?
What are extras are on electrons?
What are isotopes?
Atoms of the same element with different mass numbers
What is average atomic mass formula?
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
Where does fusion occur naturally?
occurs naturally in stars.
What is fission?
splitting of the nucleus into
two or more small nuclei
What is strong force and what does it do?
It is the strongest
of all four forces.strong force opposes the electromagnetic force of protons.strong force is like a glue
What is electromagnetic force and what does it do?
Electromagnetic force can either attract or repel the particles on which it acts. It combines the effects of electrical charge and magnetism. Electrons are kept in the orbit around the nucleus.
What is weak force and what does it do.
Weak nuclear force is the SECOND WEAKEST force. Responsible for stabilizing particles through the process of radioactive decay.