Atoms
This is the smallest particle that still can be considered an element
ATOM
John Dalton
Positively Charged Particles
Protons
Name 5 models of atoms.
Dalton, Thomson, Rutherford, Bohr, Cloud
The sum of the protons and neutrons
Mass number
Name the parts of an atom
TRUE OR FALSE: carbon atom has the same mass as an oxygen atom.
FALSE; Atoms of different elements have different masses
Negatively Charged particles
Electrons
This model explained that atoms were smooth, hard balls
Dalton's Model
+1
The small region at the center of an atom
NUCLEUS
All elements consist of atoms that cannot be ________________.
DIVIDED
A particle that has no electric charge
Neutron
According to this model, an atom was mostly open space, with a few particles that deflected strongly.
Rutherford's Model
What would be the mass number of a carbon atom that has 9 protons and 4 neutrons?
The mass number would be 13 ( 9 + 4 = 13 )
Which particles live inside the nucleus?
Protons and Neutrons
When atoms of more than one element combine in a specific ratio.
COMPOUND
Atoms with the same number of protons and different numbers of neutrons
Isotopes
Thomson's Model
Unit of measurement of an atom
Atomic Mass Units (AMU)
The number of protons in the nucleus of an atom
ATOMIC NUMBER
FALSE; An atom of one element cannot be changed into an atom of a different element by a chemical reaction.
An electron's movement is related to it's
Energy level
Cloud Model
How many neutrons would a Carbon atom have if it's mass number is 15 and it has 7 protons