Theory
Basic principles of atomic theory still recognized today was first written by:
John Dalton
Atomic theory helped explain this law when it said atoms could not be created or destroyed.
Law of Conservation of Matter (Mass)
The distance between corresponding points on successive waves
wavelength
All atoms of the same element would have this number
atomic number
A three-dimensional region around the nucleus where electrons may be found
The behavior of the cathode ray tube led scientists to believe that all atoms contained
negatively charged particles, electrons
Since atoms have characteristic masses the compounds they form must have the same composition by mass is a summary of this law.
law of definite composition of compounds
The number of waves that pass a given point in a particular time period
frequency
Isotopes have a different number of ______
neutrons
Aufbau principle
The mass of an electron was determined by ___ during the famous ____________ experiment.
Milikan, oil drop
Nitrogen can combine with oxygen to form a variety of compounds. The masses of oxygen that combine with nitrogen are related to each other by small whole number ratios. This is an example of:
law of multiple proportions
If electromagnetic radiation X has a shorter wavelength then electromagnetic radiation Y then the frequency of Y is ___________ than X.
lower
The mass in grams of one mole of an element
molar mass
Explains why in the electron configuration for nitrogen each 2p orbital only contains 1 electron.
Hund's rule
Shooting positively charged particles at gold foil led to the conclusion that an atom is mostly ________ with a _______ charged _______.
empty space, positively, nucleus
If 2 atoms of element Z combine with 14 atoms of X, then ______ atoms of Z would combine with 91 atoms of element X.
13
The release of electrons from metals when lights shines on them.
photoelectric effect
The highest magnetic quantum number that p orbitals can have
3
No 2 electrons have the same 4 quantum numbers is stated by
Pauli exclusion principle
Two parts of the original atomic theory now known to be incorrect:
atoms can be subdivided, atoms of the same element do not share all of the same properties
Often referred to as a rule, this scientific law explains what happens to valence electrons to create chemical bonds since all atoms prefer to have eight valence electrons.
Max Planck stated that objects that are heated, but are not flammable, release light in
quanta
This quantum number is represented by the letters s, p, d and f
orbital
palladium