CHEM 111 Exam 2|53 Questions with Verified Answers,100% CORRECT
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Course
CHEM 111
Institution
CHEM 111
CHEM 111 Exam 2|53 Questions with Verified Answers
Name the three periodic trends. - CORRECT ANSWER ionization energy, electron affinity, atomic radius
Write a sample equation for the first ionization energy of magnesium. - CORRECT ANSWER Mg → Mg⁺ + e⁻
Which electrons are bound more ...
CHEM 111 Exam 2|53 Questions with Verified Answers
Name the three periodic trends. - CORRECT ANSWER ionization energy, electron
affinity, atomic radius
Write a sample equation for the first ionization energy of magnesium. - CORRECT
ANSWER Mg → Mg⁺ + e⁻
Which electrons are bound more tightly: core or valence? - CORRECT ANSWER
core
What is the general trend in first ionization energy across a period? - CORRECT
ANSWER increases from left to right
What is the general trend in first ionization energy down a group? - CORRECT
ANSWER decreases as you go down
Why are first ionization energies versus atomic number across a period not
linearly related? - CORRECT ANSWER electron repulsions
Name two exceptions to the trends in first ionization energy? - CORRECT ANSWER
Be to B and N to O
Define electron affinity. - CORRECT ANSWER energy change associated with
adding an electron to a gaseous atom
Define ionization energy. - CORRECT ANSWER energy required to remove an
electron from a gaseous atom or ion
What is the trend in negativity of electron affinity across a period? - CORRECT
ANSWER more negative left to right
What is the trend in negativity of electron affinity down a group? - CORRECT
ANSWER more positive as you go down
, What is the trend in atomic radius across a period? - CORRECT ANSWER decreases
left to right
Why does the atomic radius decrease across a period? - CORRECT ANSWER
Effective nuclear charge increases, so valence electrons are drawn closer to the
nucleus.
What is the trend in atomic radius down a group? - CORRECT ANSWER increases
as you go down
What primarily determines an atom's chemistry? - CORRECT ANSWER the number
and type of valence electrons
Note which is left and which is right, generally: metals and non-metals. - CORRECT
ANSWER Metals are generally on the left, and non-metals are generally on the
right.
What is true about the reactivity of the alkali metals? - CORRECT ANSWER They
are the most reactive metals in the periodic table.
In the alkali metals, what is the trend of density going down the group? -
CORRECT ANSWER increases
In the alkali metals, what is the trend of melting and boiling points going down
the group? - CORRECT ANSWER decrease
What does isoelectronic mean? - CORRECT ANSWER same number of electrons
In a chromium atom, what is the electron configuration? When electrons are
removed from chromium, which orbital are they taken from first? - CORRECT
ANSWER Chromium's electron configuration in [Ar]4s¹3d⁵, with the 4s and 3d
orbitals both half-filled. When electrons are removed, they are taken from the 4s
orbital first.
What is the element of the lowest atomic number that contains a complete d
subshell in the ground state? - CORRECT ANSWER copper
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