Chemical bonding results in ________.
lower bond lengths
The shielding effect is the tendency of inner energy level electrons to block the attraction of the nucleus for _________.
The CO molecule is _________.
linear and polar.
linear and nonpolar
tetrahedral and nonpolar
trigonal planar and polar
A solute is most likely to be highly soluble in a solvent if the solute is _____ and the solvent is ______.
ionic or polar, non-polar
ionic or polar, polar
The boiling point of CH4 is much lower than that of HF. This is because:
of ion-dipole interactions in CH4.
HF is more polarizable.
of hydrogen bonding in HF.
CH4 is polar.
The intermolecular forces of attraction in the above substances is described by which of the following:
dispersion (or London) forces
dipole-dipole forces (permanent dipoles)
What type of intermolecular forces is due to the attraction between temporary dipoles and their induced temporary dipoles?
What type of interparticle forces holds liquid N2 together?
Which statement is false?
Molecular solids generally have lower melting points than covalent solids
Metallic solids exhibit a wide range of melting points because metallic bonds cover a wide range of bond strength
Most molecular solids melt at lower temperatures than metallic solids
The interactions among the molecules in molecular solids are generally stronger than those among the particles that define either covalent or ionic crystal lattices
Which one of the following classifications is incorrect?
H2O(s), molecular solid
SiC(s), covalent solid
C4H10(s), molecular solid
S(s), metallic solid
Which is classified as nonpolar covalent?
the H-I bond in HI
the N-Cl bond in NCl3
the H-S bond in H2S
the N-H bond in NH3
Which one of the compounds below is most likely to be ionic?
Choose the molecule that is incorrectly matched with the electronic geometry of the central atom.
CF4 – tetrahedral
H2O – tetrahedral
BeBr2 - linear
PF3 – pyramidal
Which of the following four molecules are polar: PH3 OF2 HF SO3?
all except SO3
only HF and OF2
all of these
Which of the following is an ionic compound?
Which one of the formulas for ionic compounds below is incorrect?
When naming a transition metal ion that can have more than one common ionic charge, the numerical value of the charge is indicated by a ____.
Roman numeral following the name.
superscript after the name
The nonmetals in Groups 6A and 7A ____.
lose electrons when they form ions
have a numerical charge that is found by subtracting 8 from the group number
all have ions with a – 1 charge
end in -ate
Which of the following is NOT a cation?
Iron (III) ion
An -ate or -ite at the end of a compound name usually indicates that the compound contains ____.
fewer electrons than protons
only two elements
a polyatomic anion
Which of the following is true about the composition of ionic compounds?
They are composed of anions and cations
They are composed of anions only
They are composed of cations only
They are formed from two or more nonmetallic elements
Which element, when combined with fluorine, would most likely form an ionic compound?
Which of the following compounds contains the lead (II) ion?
What is the correct formula for potassium sulfite?
What type of compound is CuSO4?
Molecular compounds are usually ____.
composed of two or more transition elements
composed of positive and negative ions
composed of two or more nonmetallic elements.
exceptions to the law of definite proportions
When naming acids, the prefix hydro- is used when the name of the acid anion ends in ____.
What is the name of H2SO3?
When the name of an anion that is part of an acid ends in -ite, the acid name includes the suffix ____.
What is the correct name for Sn (PO)?
tin (II) phosphate
tin (III) phosphate
tin (IV) phosphate