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Atoms
Molecules
Electrons
Lewis structures
Geometry
100
Which of the following atoms is the most electronegative? a) Na b) P c) Cl d) I
c) Cl
100
Diatomic molecules that are formed from two different types of nonmetal atoms generally form ______. a) ionic bonds b) polar covalent bonds c) nonpolar covalent bonds d) no bonds
b) polar covalent bonds
100
What is the expected ground state electron configuration for the most stable ion of bromine? a) [Ar] 4s2 3d10 4p5 b) [Ar] 4s2 3d10 4p6 c) [Ar] 4s2 4d10 4p6 d) [Ar] 4s2 4d10 4p5
b) [Ar] 4s2 3d10 4p6
100
What do Lewis structures show?
The arrangement of valence electrons.
100
Give the molecular structure of SiO2.
linear
200
Which of the following is true concerning trends on the periodic table? a) In general, smaller atoms have larger ionization energies and smaller electronegativity values. b) In general, smaller atoms have smaller ionization energies and smaller electronegativity values c) In general, smaller atoms have smaller ionization energies and larger electronegativity values d) In general, smaller atoms have larger ionization energies and larger electronegativity values
d) In general, smaller atoms have larger ionization energies and larger electronegativity values
200
Consider a molecule of carbon monoxide. What is the most appropriate statement to make? a) There is an equal chance of bonding electrons being close to either atom b) A bonding electron is more likely to exist near C because carbon needs more electrons to get to a noble gas electron configuration c) A bonding electron is more likely to exist close to O because the oxygen nucleus has a stronger attraction for electrons than does the carbon nucleus d) Because we never know where the electron is, we cannot say where a bonding electron is more likely to be
c) A bonding electron is more likely to exist close to O because the oxygen nucleus has a stronger attraction for electrons than does the carbon nucleus
200
The electron configuration 1s2 2s2 2p6 3s2 3p6 is the correct electron configuration for the most stable form of which ion? a) the calcium ion b) the magnesium ion c) the fluoride ion d) the oxide ion
a) the calcium ion
200
How many resonance structures can be drawn for the carbonate ion? a) 1 b) 2 c) 3 d) 4
c) 3
200
Give the molecular structure of BF3
Trigonal planar
300
Which of the following does not have a noble gas electron configuration? a) the Na+ ion b) the Mg2+ ion c) the S2- ion d) the Fe3+ ion
d) the Fe3+ ion
300
The formula of the ionic compound formed in the reaction between lithium and sulfur is _____. a) LiS2 b) Li2S c) LiS d) Li2S3 e) None of these
b) Li2S
300
Which of the following has the smallest radius? a) Cl- b) K+ c) Ar d) Ca2+ e) S2-
d) Ca2+
300
If you run out of valence electrons before all the atoms in your Lewis structure meet the octet and duet rules, what should you do?
Add more bonds (shared electrons).
300
Give the molecular structure of ClO2
bent
400
What is the most electronegative element?
Fluorine
400
What is the chemical formula for the ammonium ion and the nitrate ion?
NH4+ and NO3-
400
1s2 2s2 2p6 3s2 3p6 is the electron configuration for which one of the following ions? a) F- b) S2- c) Na+ d) Ca+ e) None of these AND give another ion that has the same configuration as the one you chose above.
b) S2-
400
Which compound has bond angles of 109.5 degrees around the central atom? a) BH3 b) CBr2H2 c) XeCl4 d) SF4 e) HCl
b) CBr2H2
400
What is the molecular structure of ammonia?
Trigonal pyramid
500
How many of the compounds are nonpolar? CBr2H2, BH3, XeCl4, SF4, HCl a) 1 b) 2 c) 3 d) 4 e) 5
b) 2