what element has a mass number of 92?
uranium (U)
12 protons and 12 neutrons
magnesium
has 79 protons
gold
what particles are in the nucleus
protons and neutrons
An element with a mass number of 65 and 36 neutrons has how many protons? what element is it?
29 protons
copper
A particle of electromagnetic radiation with no mass that carries a quantum of energy
photon
The emission of electrons from a metal’s surface when light of a certain frequency shines on it
photoelectrtic effect
what is an isotope?
a form of an element that has the same number of protons and electrons, but different number of neutrons
the lowest allowable energy state of an atom
ground state
The shortest distance between equivalent points on a continuous wave
wavelength
The minimum amount of energy that can be lost or gained by an atom
quantum
A form of energy that exhibits wavelike behavior as it travels through space
electromagnetic radiation
The set of frequencies of the electromagnetic waves
emitted by the atoms of an element
atomic emission spectrum
A three-dimensional region around the nucleus of an atom that describes an electron’s probable location
atomic orbital
A figure indicating the relative sizes and energies of atomic orbitals
atomic orbital
A figure indicating the relative sizes and energies of atomic orbitals
principal quantum number
states that electrons must fill the lowest energy orbitals first
aufbau principle
states that a single orbital can only hold 2 electrons
Pauli exclusion principle
states that electrons fill equal energy orbitals one at a time
Hund's rule
states that it is impossible to know both the velocity and the position of a particle at the same time
Heisenberg uncertainty principle
What equation relates wavelength, frequency, and speed of light?
c = (wavelength) x (frequency)
what is the noble gas configuration of arsenic (As)
[Ar] 4s23d104p3
what is the electron configuration for Yttrium (Y)?
1s22s22p63s23p64s23d104p65s24d1
Has an electron configuration of:
1s22s22p6
Has a noble gas configuration of:
[Ne] 3s23p1
Aluminum