Unit One Content Flashcards
Electrons need to be filled singly before being doubled
Hunds rule
The _____ precisely and electrons is known, the ______ precisely its velocity is known.
More, less
Electrons need to be filled with the same spin
Hunds rule
Electrons must fill the lower levels before it fills higher levels
Aufbaus principle
No two electrons can have the same placement and spin within an element
Pauli exclusion principle
How close a number is to a true value
Accuracy
How close numbers are to one another
Precision
Charge of Alpha Rays
Positive
Charge of beta Rays
Negative
Isotopes have the same number of protons but a different number of
Neutrons
Letter used to describe mass number
A
Letter used to describe atomic number
Z
Molar mass is usually expressed in
Grams
Blackbody radiation
given off by a solid when it is heated
The effect when electrons are emitted and a light of a certain frequency shine on a surface
Photoelectric effect
The minimum frequency required to excite electrons
Threshold frequency
The wavelength associated with a really small mas
De Broglie wavelength
Principle quantum number
n
The angular momentum number
l
Magnetic quantum number
Ml
Magnetic spin number
Ms
Atomic orbitals that have the same energy are
Degenerate
Weakly attracted to a magnetic field because they have unpaired electrons
Paramagnetic
Weakly repelled by a magnetic field because they have no unpaired electrons
Diamagnetic
