Review on Atoms
Please describe or define what a …….
ProtonElectronNeutronNucleusCompound elementAtomIsotopeValence ElectronIonPlease fill in the blank
Atomic Number=
=
.
Atomic Mass rounded =
.
Mass Number- Protons =
.
How many electrons does the first energy shell hold?
How many electrons does the second energy shell hold?
How many electrons does the third energy shell hold?
Use the word bank to answer the following questions
Democritus
Neils Bohr
1.
John Dalton
compounds
J.J. Thomson
Ernest Rutherford
electron cloud
Greek philosopher who asked “could matter be divided into smaller and
smaller pieces forever?”
2.
named the smallest piece of matter “atomos” meaning “not to be cut”
3.
said elements are composed of atoms. Atoms of the same element are exactly
alike and atoms of different elements are different.
are formed by joining
two atoms of two or more elements.
4.
is responsible for the Plum Pudding Model which stated atoms are made from
a positively charged substance with negatively charged electrons scattered about the atom
5.
reasoned that all of the atom’s positively charged particles were contained in
the nucleus. The negatively charged particles were scattered outside the nucleus in the
.
6.
placed each electron on a specific energy level. He is also famous for the
Model.
Atomic #
__________
Atomic Mass
__________
_______
Mass Number
__________
_____
_____
# of Protons
__________
______
____
# of Neutrons
__________
____
# of Electrons
__________
_______
___
_________
________
__
# of Valence Electrons
___
______