WorksheetsChemistry AS Edexcel (Atomic Structure & Bonding)
Total questions: 21
Worksheet time: 11mins
Which of the following ions has the biggest radius?
S 2-
Cl-
K+
Ca2+
The first five successive ionization energies for an element J, in kJ mol-1 , are:
The formula of the compound of chlorine with element J is..
JCl
JCl2
JCl3
J2Cl3
Which of the following is the correct order of increasing melting temperature of elements of Period 3?
Na, Mg, Al, Si
Na, Mg, Si, Al
Si, Na, Mg, Al
Si, Al, Mg, Na
Which one of the following elements undergoes the change in electronic configuration shown when it forms the stated ion?
Atom 1s22s22p63s23p3
Ion 1s22s22p63s23p6
B to B3+
Al to Al3+
N to N3–
P to P3–
Which of the following observations provides the best evidence for the presence of ionic bonding in an unknown substance?
The substance conducts electricity
in the solid state.
in the solid state and in aqueous solution.
in the solid state and when molten.
when molten but not in the solid state.
In which of the following compounds is the anion most polarized?
LiF
LiI
KF
KI
Which of these electron density maps best represents the bonding in the compound lithium iodide, LiI?
A
B
C
D
Which of these has a dative covalent bond?
NH3
OH-
H2O
H3O+
Which of the following molecules is polar?
Carbon dioxide, CO2
Silicon tetrachloride, SiCl4
Ammonia, NH3
Boron trifluoride, BF3
In the ethene molecule, the C=C double bond is made up of
two sigma bonds.
one pi bond.
two pi bonds.
one sigma bond and one pi bond.
Fullerenes, graphite and diamond are all forms of carbon. Fullerenes dissolve in petrol, but diamond and graphite do not.
This is because
the bonds between the carbon atoms in fullerenes are weaker than in diamond or graphite.
diamond and graphite are giant structures but fullerenes are molecular
there are delocalized electrons in diamond and graphite but not in fullerenes.
there are covalent bonds in diamond and graphite, but not in fullerenes.
Samples of 1-chloropropane and 1-bromopropane are warmed with water containing dissolved silver nitrate in the presence of ethanol.
The 1-chloropropane reacts more slowly because
the C—Cl bond is more polar than the C—Br bond.
the C—Cl bond is stronger than the C—Br bond.
1-chloropropane is less soluble than 1-bromopropane.
1-chloropropane is a weaker oxidizing agent than 1-bromopropane.
Which of these carbon structures is represented by the diagram?
Graphite
Diamond
A fullerene
A carbon nanotube
Pentan-1-ol is less soluble than ethanol in water. The best explanation for this is that
pentan-1-ol molecules cannot form hydrogen bonds with water molecules, but ethanol molecules can.
London forces are stronger between pentan-1-ol molecules than between ethanol molecules.
carbon-carbon bonds are stronger in pentan-1-ol than in ethanol.
permanent dipole forces are stronger in pentan-1-ol than in ethanol
Along the series of the Group 5 hydrides (NH3 , PH3 andAsH3 ), the boiling temperatures
decrease.
decrease then increase.
increase.
increase then decrease.
Consider the following compounds, E, F, G and H.
The boiling temperature of these compounds increases in the order
H G F E
G H E F
E F G H
F E H G
What are the strongest forces between molecules of hydrogen fluoride, HF?
Dipole-dipole forces.
Hydrogen bonds.
Ionic interactions.
London forces
The diagram below is taken from a student’s examination paper. It shows the hydrogen bonding between two water molecules. Identify the error in the diagram.
The H–O–H bond angle within each water molecule should be 900
There should only be one lone pair of electrons on each oxygen atom.
The O–H–O bond angle between the water molecules should be 1800
The hydrogen atoms should be δ– and the oxygen atoms should be δ+.
1 The bond angle in beryllium chloride, BeCl2 , is most likely to be
90
104.5
120
180
The shape of a molecule of boron trifluoride, BF3, is
trigonal planar.
pyramidal.
tetrahedral.
T-shaped.
Which of these bond angles is the smallest?
HNH in NH3
HCH in CH4
HOH in H2O
OCO in CO2
