Bohr Model
What is a Bohr model?
system consisting of a small, dense nucleus surrounded by orbiting electrons
_N2+_H2=_NH3
1, 3, 2
What is a lewis dot structure?
diagrams that represent the valence electrons of atoms within a molecule
What are periods?
horizontal rows (down)
Who created the Bohr model?
Niels Bohr
_Ca+_O2=_CaO
2, 1, 2
Who created the Lewis dot structure?
Gilbert N. Lewis
What are groups (familys)?
vertical columns (across)
What is a cation?
more protons than electrons/positive charge
_Cu2O+_C=_Cu+_CO2
2, 1, 4, 1
What is a lewis dot symbol?
display electrons in the outermost energy level
What is an atomic number?
number of protons=number of electrons
What is an anion?
more electrons than protons/negative charge
_Na+_HCl=_H2+_NaCl
2, 2, 1, 2
What is a covalent bond?
chemical bond formed by the sharing of a pair of electrons between two atoms
What is atomic mass?
number of protons plus the number of neutrons
What is a chemical compound?
composed of two or more separate elements
_Na+_O2=_Na2O
4, 1, 2
How many dots can be on one side of each orbital?
2
What is the periodic table?
chemical elements arranged by atomic number, electron configuration, and recurring chemical properties