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56 Cards in this Set

  • Front
  • Back
The lowest allowable energy state of an atom is called its
ground state
Bohr's model of the atom predicted the
THe smaller an electrons orbit the ______ the atoms energy level
The larger an electron's orbit the ______ the atom's energy level
When energy is added to a hydrogen atom it's _________ moves to a higher-energy orbit
What is Heisenberg uncertainty principle?
States that it is impossible to know both the velocity and position of a particle at the same time
What is Schrodinger wave equation?
It led to the quantum mechanical model of the atom.
Each orbital may contain____electrons
All s orbitals are
spherically shaped
There are _____ equal energy p orbitals.
What is the electron configuration?
The arrangement of electrons in an atom.
THe arrangement of electrons is the most stable stable arrangement is called the atom's
groundstate electron configuration
THe Pauli exclusion principle states that
a maximum of two electrons may occupy a single atomic orbital
Hund's rule states
that single electrons with the same spin must occupyeach equal energy orbital before additional electrons with opposite spins occupy the same orbital,
What is the noble-gas notation
Uses bracketed symbol nearest preceding noble gas atom in the periodic table.
The electrons in the most outermost orbitals are called
valance electrons
What is the law of octaves?
the properties of the elements repeated every eight elements.
THe first periodic table was created by
Dmitri Mendeleev
In Mendeleev's periodic table elements were in order from
increasing atomic mass
Who arranged the periodic table a second time?
Henery Mosley
How did Mosley organize the periodic table?
In increasing atomic number
What is a column in the periodic table
What is a row in the periodic table
Group A elements
transition metals
elements that conduct energy
Group B elements
transition metals
THere are ___ main classifications of elements
Into many blocks is the periodic table divided?
How many d blocks are there?
What is ionization energy?
the energy required to remove an electron from a gaseous atom.
What does the electronegativity of an element indicate?
indicates its atoms ability to attract electrons in a chemical bond.
What do all elements in a group have in common?
THe share the same # of valance elec.
Alkali metals are
shiny gray solids, soft enough to be cut with a knife
Alakline earth metals form ions with a ____ charge
The P-block contains
metals, metalloids, nonmetals, noble gases
___ is the most abundant element in the earths crust
Plants and animals get the nitrogen they need from
nitrogen-fixing bacteria
Ozone is
an allotrope of oxygen
How can a metal be a temparary magnet?
When there is an unpaired electron in in the valance orbital of a metal atom or ion
needed for the development of red blood cells
The best conductor of electricity
Atomic Radius is
The size of the atom
Atoms get ___ when moving down the periodic table
Atoms get ___ when moving across the periodic table
S orbial holds ____ pairs of electrons
P orbial holds ____ pairs of electrons
D orbial holds ____ pairs of electrons
F orbial holds ____ pairs of electrons
Alkaline earth metals
somewhat soft,
less reactive than Alkali metals,
Transition Metals
Most gray, hard, and dense
less reactive than Alkaline earth metals
Other Metals
Softer than transition metals,
gray and malleble
less reactive than most metals
Properties between those of metals and Non-metals
Very reactive
can form a compound with almost all metals
commonly used as cleaners
Noble Gases
colorless odorless gasses at room temp.
chemically inert
other non-metals
Life elements
light, non-metallic
poor conductors of heat and elec.
Lanthanides and Actinides
Rare earth metals
most reactive