chem test
Diamond is a good conductor of
heat only.
As the number of carbon atoms in a molecular formula increases, the number of possible isomers
increases rapidly.
The bonds between atoms in a layer of graphite are
intermediate in character between single and double bonds.
Which formula shows the numbers and types of atoms in a molecule but not the bonds?
molecular formula
The carbon-hydrogen bonds of alkanes are
nonpolar.
How many structural isomers does CH4 have?
one
In alkanes with three or fewer carbon atoms,
only one molecular structure is possible.
Which of the following is an alkane?
propane
Each carbon atom in a molecule forms four single covalent bonds with other atoms in a(n)
saturated hydrocarbon.
Isomers are compounds that have
the same molecular formula but different structures.
When two identical atoms are on opposite sides, the molecule is
trans
How many structural isomers does C4H10 have?
two
Which alkene is found in the wax covering of apples?
∝-farnesene
Which of the following is the electron configuration of carbon in the ground state?
1s22s22p2
How many valence electrons does a carbon atom have?
4
What are the properties of alkynes?
Both a and b are correct.
Which of the following statements about diamond and graphite is true?
In diamond, each atom is bonded to four other atoms. In graphite, each atom is bonded to three other atoms.
What properties of alkanes make them useful for paving roads?
Their long carbon-atom chains have low melting points.
Which statement about London dispersion forces is correct?
Their strength increases as the mass of the molecule increases.
Which hydrocarbons are saturated?
alkanes
Which hydrocarbons do NOT have double or triple bonds?
alkanes
Which hydrocarbons have triple covalent bonds?
alkynes
What are the properties of aromatic hydrocarbons?
all of the choices
Hydrocarbons are grouped into series according to the
bonds between carbon atoms.
Carbon atoms readily join with atoms of
both other elements and carbon.
Organic compounds are so numerous because carbon atoms
can bond with each other in many ways.
What do all organic compounds contain?
carbon
Carbon shows a very strong tendency to form
covalent bonds.
What type of bond is rigid and does not allow atoms to rotate freely?
double bond
Which of the following representations best shows the shape of a molecule?
drawing or model
Which allotrope of carbon was the most recently discovered?
fullerenes
Which of the following is an allotropic form of carbon?
fullerenes
Which allotrope of carbon feels greasy and crumbles easily?
graphite
