What is
Lanthanide and Actinide or rare earth metals
100
Atomic number
What is number of protons in nucleus. atoms are arranged this way in the periodic table.
100
Mass number
What is
Protons + Neutrons
200
Isotopes
What is Atoms of the same element with different numbers of Neutrons
200
Molar mass
What is
Average of the mass numbers weighted by percent abundance
200
Mole
What is 6.02 * 10^23 Molecules
200
Ideal Gas Equation
What is PV=nRT
p= pressure, V= volume, T= temperature in K and R= gas constant
n= moles
.0821 Latm /MolK
200
Percent composition
What is
Mass of each element or component in a compound divided by the total molar mass for the substance
300
Empirical formula
What is
The simplest ratio of one element to another in a compound
300
Aufbau Principle
What is
When building up the electron configuration of an atom, electrons are placed into orbitals, subshells and shells in order of increasing energy.
300
Period Table Groups
What is Group 1: Alkali Metals
Group 2: Alkaline Earth Metals
Group 3-12: Transition Metals
Group 17: Halogens
Group 18: Noble Gases
300
Pauli exclusion principle
What is
Within an Atom, no two electrons can have the same set of quantum numbers. Each electron in any atom has its own distinct set of four quantum numbers.
300
Hund's rule
What is
When an electron is added to a sub shell, it will always occupy an empty orbital if one is available.
400
Dalton's theory
What is 1. All matter is made of atoms.
2. all atoms of an element are identical in mass and properties
3.Compounds are formed by 2+ kinds of atoms
4. matter cannot be destroyed in a chemical reaction
400
Bohr model
What is
When an electron absorbs energy, it jumps to a higher energy level. when it emits energy, the electron returns to a lower level.
400
Change in internal energy
What is E = hv = hC/?
h= plancks constant = 6.63e^-34 Joule*sec
v=frequency of the radiation
= wavelength of the radiation
c= speed of light, 3.00e^8 meters/sec
c =?v
400
Ionization
What is Amount of energy necessary for removal of an electron from the atom.
400
Kinetic energy
What is incoming energy (Photon)= Ionization energy + Kinetic energy of the electron
500
PES
What is
Photoelectron Spectra. used to determine where electrons are and how many there are?
500
Heisenberg uncertainty principle
What is
It’s impossible to know the position and momentum of an electron at a particular instant.
500
Ionization energy
What is
Energy required to remove an electron
500
Electronegativity
What is
How strongly the nucleus of an atom attracts the electrons of other atoms in a bond.
500
Coulomb's Law
What is All bonds occur because of electrostatic attractions. Atoms stick together to form molecules , and atoms stick together to form liquids or solids because of the negatively charged electrons of one atom are attracted to the positively charged nucleus of another atom.
Attractive Force=(q₁q₂)/(r²)
Bigger charge means stronger bond
Charges close together mean stronger bonds