CHEM-1030 Exam 2 Questions and Correct
Answers| Auburn University
On the periodic table, atomic radius ________ as you go from left to right on
each period and ________ as you go down each group
- decreases
- increases
Ions in the same _______ have the same charge
group
_______ are smaller than neutral atoms while _______ are larger than neutral
atoms
- cations
- anions
Ion size _______ as you go down each group
increases
define Isoelectronic
same electron configuration
,In _______, the valence electrons are removed and the farthest electrons from
the nucleus are in the _______ energy level
- cations
- n-1
In anions, electrons are ______to the valence shell where they experience a
smaller ________
- added
- effective nuclear charge
define Ionization Energy (IE)
the minimum energy needed to remove an electron from an atom or ion
Which electrons are the easiest to move and why?
- valence electrons
- they have the lowest IE
- first ionization energy (IE-1) is the energy to do what?
- second ionization energy (IE-2)?
- remove an electron from a neutral atom
- remove an electron from a 1+ ion
- so on
,The larger the effective nuclear charge on the electron, the more what?
energy it takes to remove it
The farther the distance an electron is from the nucleus, the _______ it takes to
do what?
less energy to remove it
IE-1 generally _______ as you go down each column, as valence electrons are
what?
- decreases
- farther from the nucleus
The removal of successive electrons costs more energy with each electron
removed. Why is this?
- they shrink in size and the outer electrons are harder to remove because they're
closer to the nucleus
Why do cations shrink in size as electrons are removed?
because they have more protons than electrons
, What happens when core electrons are removed?
large increase in energy
Energy is ______ when a neutral atom gains an electron
released
The element with the highest electron affinity in each period is a what?
halogen
The ______ energy that is released, the ______ the electron affinity
- more
- larger
The electron affinity of some alkali earth metals and all noble gases are what?
endothermic (positive)
Electron affinity generally _______ as you go down each column and _______ as
you go across each period
- decreases
- increases
Answers| Auburn University
On the periodic table, atomic radius ________ as you go from left to right on
each period and ________ as you go down each group
- decreases
- increases
Ions in the same _______ have the same charge
group
_______ are smaller than neutral atoms while _______ are larger than neutral
atoms
- cations
- anions
Ion size _______ as you go down each group
increases
define Isoelectronic
same electron configuration
,In _______, the valence electrons are removed and the farthest electrons from
the nucleus are in the _______ energy level
- cations
- n-1
In anions, electrons are ______to the valence shell where they experience a
smaller ________
- added
- effective nuclear charge
define Ionization Energy (IE)
the minimum energy needed to remove an electron from an atom or ion
Which electrons are the easiest to move and why?
- valence electrons
- they have the lowest IE
- first ionization energy (IE-1) is the energy to do what?
- second ionization energy (IE-2)?
- remove an electron from a neutral atom
- remove an electron from a 1+ ion
- so on
,The larger the effective nuclear charge on the electron, the more what?
energy it takes to remove it
The farther the distance an electron is from the nucleus, the _______ it takes to
do what?
less energy to remove it
IE-1 generally _______ as you go down each column, as valence electrons are
what?
- decreases
- farther from the nucleus
The removal of successive electrons costs more energy with each electron
removed. Why is this?
- they shrink in size and the outer electrons are harder to remove because they're
closer to the nucleus
Why do cations shrink in size as electrons are removed?
because they have more protons than electrons
, What happens when core electrons are removed?
large increase in energy
Energy is ______ when a neutral atom gains an electron
released
The element with the highest electron affinity in each period is a what?
halogen
The ______ energy that is released, the ______ the electron affinity
- more
- larger
The electron affinity of some alkali earth metals and all noble gases are what?
endothermic (positive)
Electron affinity generally _______ as you go down each column and _______ as
you go across each period
- decreases
- increases
