CHEM 1030 EXAM 1 PRADO
When filling orbitals that have the same energy, place one electron in
each before completing pairs - ANSWERS-hunds rule
chromium - ANSWERS-[Ar] 3d5 4s1
copper - ANSWERS-[Ar] 3d10 4s1
Electrons in lower energy shells are called - ANSWERS-core
electrons
the electrons in all the sublevels with the highest principle energy
shell (level)
located in the outermost shell (energy level) - ANSWERS-valence
electrons
the noble gases have - ANSWERS-8 valence electrons
share same configuration - ANSWERS-isoelectronic ions
atomic size does what as we go down a column - ANSWERS-increase
Atomic size does what across a period - ANSWERS-decrease
,more pull from nucleus = - ANSWERS-smaller
much smaller than parent atoms - ANSWERS-cations
much larger than parent atoms - ANSWERS-anions
energy required to remove one mole of electrons from one mole of
gas phase atoms or ions (positive energy)
removing electrons requires energy - ANSWERS-ionization energy
the energy change that occurs when one mole of electrons combines
with one mole of atoms or ions
energy is released when electrons are added (negative energy) -
ANSWERS-electron affinity
the study of matter and the changes it undergoes - ANSWERS-
chemistry
anything that has mass and takes up space - ANSWERS-matter
the smallest particle of an element that retains the properties of that
element - ANSWERS-atom
, a substance that cannot be chemically broken down into simpler
substances - ANSWERS-element
a substance composed of 2 or more elements in fixed definite
proportions - ANSWERS-compound
How does a mixture differ from a compound? - ANSWERS-A
mixture can be separated into its components by physical methods. A
compound can only be separated into its elements through chemical
methods
a mixture in which the composition varies from one region of the
mixture to another (salt & pepper) - ANSWERS-heterogeneous
mixture
a mixture made of multiple substances, but it appears to be one
substance (salt water) - ANSWERS-homogenous mixture
a way to describe matter based upon observations and measurements -
ANSWERS-properties
Density is what kind of property? - ANSWERS-intensive
properties that are independent of size - ANSWERS-intensive
properties
When filling orbitals that have the same energy, place one electron in
each before completing pairs - ANSWERS-hunds rule
chromium - ANSWERS-[Ar] 3d5 4s1
copper - ANSWERS-[Ar] 3d10 4s1
Electrons in lower energy shells are called - ANSWERS-core
electrons
the electrons in all the sublevels with the highest principle energy
shell (level)
located in the outermost shell (energy level) - ANSWERS-valence
electrons
the noble gases have - ANSWERS-8 valence electrons
share same configuration - ANSWERS-isoelectronic ions
atomic size does what as we go down a column - ANSWERS-increase
Atomic size does what across a period - ANSWERS-decrease
,more pull from nucleus = - ANSWERS-smaller
much smaller than parent atoms - ANSWERS-cations
much larger than parent atoms - ANSWERS-anions
energy required to remove one mole of electrons from one mole of
gas phase atoms or ions (positive energy)
removing electrons requires energy - ANSWERS-ionization energy
the energy change that occurs when one mole of electrons combines
with one mole of atoms or ions
energy is released when electrons are added (negative energy) -
ANSWERS-electron affinity
the study of matter and the changes it undergoes - ANSWERS-
chemistry
anything that has mass and takes up space - ANSWERS-matter
the smallest particle of an element that retains the properties of that
element - ANSWERS-atom
, a substance that cannot be chemically broken down into simpler
substances - ANSWERS-element
a substance composed of 2 or more elements in fixed definite
proportions - ANSWERS-compound
How does a mixture differ from a compound? - ANSWERS-A
mixture can be separated into its components by physical methods. A
compound can only be separated into its elements through chemical
methods
a mixture in which the composition varies from one region of the
mixture to another (salt & pepper) - ANSWERS-heterogeneous
mixture
a mixture made of multiple substances, but it appears to be one
substance (salt water) - ANSWERS-homogenous mixture
a way to describe matter based upon observations and measurements -
ANSWERS-properties
Density is what kind of property? - ANSWERS-intensive
properties that are independent of size - ANSWERS-intensive
properties
