WorksheetsMolecules, Macromolecules and Metallic bonding
Total questions: 20
Worksheet time: 20mins
The atom of element Z has 6 electrons in its outer shell. How would this element react?
It shares two electrons with four from another atom to form two covalent bonds.
It shares four electrons with four from another atom to form four covalent bonds.
It shares four electrons with two from another atom to form four covalent bonds.
It shares two electrons with two from another atom to form two covalent bonds.
Which of the following compounds are formed by covalent bonding?
Potassium fluoride, KF
Propane, C3H8
Carbon dioxide, CO2
Lithium bromide, LiBr
CH4, H2O and HCl are covalent compounds.
Which atoms in these compounds do not use all of their outer shell electrons in bonding?
C and O
C and H
Cl and O
Cl and C
Which row correctly describes a simple covalent compound?
low melting point
high boiling point
can conduct electricity
cannot conduct electricity
The electronic configuration of four different atoms are shown below.
Which atoms form covalent compounds?
W and X
W, X and Y
W and Z
X, Y and Z
Which statement about bonding is not correct?
Covalent bonding involves non metal elements.
Covalent bonding involves electron sharing.
Covalent bonding involves electron transfer.
Covalent bonding does not involve metal elements.
Which of the following molecules contains only single covalent bonds?
N2
F2
O2
CO2
Ammonia is a covalent compound consisting of one nitrogen atom bonded to three hydrogen atoms.
Which statement is correct for a molecule of ammonia?
The number of shared pairs of electrons is five.
The number of shared pairs of electrons is three.
There are single covalent bonds between the hydrogen atoms.
Each hydrogen atom donates one pair of electrons to the central nitrogen atom.
A student analysed an ionic compound and a covalent compound using a melting point apparatus. She found the ionic compound had a much higher melting point than the covalent compound.
Which statement explains this observation?
Ionic compounds are formed from metals only.
Ionic compounds are formed from nonmetals and nonmetals.
There are strong electrostatic forces of attraction in ionic compounds.
There are strong intermolecular forces in ionic compounds.
Carbon dioxide is a simple molecular substance in which the molecules are formed by covalent bonding between one carbon atom and two oxygen atoms.
Which dot and cross diagram below shows the correct outer shell arrangement of electrons in a molecule of CO2?
A student has drawn a dot and cross diagram to represent a molecule of ethene, C2H4, as shown below.
What is wrong with the students drawing?
The number of electrons shared between the carbon atoms is incorrect.
The number of electrons shared between each carbon and hydrogen is incorrect.
The is nothing wrong with the drawing.
The total number of electrons shared is incorrect.
Which of the following statements about graphite and diamond are incorrect?
They are allotropes of carbon.
They both conduct electricity.
They form different numbers of bonds within their structures.
They have different uses.
Which statement correctly describes the structure of macromolecules?
Giant molecular crystal which is held together by weak intermolecular forces.
Giant molecular crystal which is held together by strong ionic bonds.
Giant molecular crystal which is held together by weak metallic bonds.
Giant molecular crystal which is held together by strong covalent bonds.
The following statements describe the structure and properties of silicon(IV) oxide.
1. Giant covalent structure held together by many strong covalent bonds.
2. It is a very hard substance.
Which of the following is correct for statement 1 and 2?
Statement 2 is correct but statement 1 is incorrect.
Both statements are incorrect.
Both are correct and statement 1 explains statement 2.
Both are correct and statement 2 explains statement 1.
Which statement about graphite and diamond is not correct?
Graphite is a good lubricant due to the weak forces in between the layers.
Diamond is used as a drill tip because it is an extremely hard substance.
Graphite has a low melting point due to the weak forces in between the layers
Diamond is an allotrope of carbon.
Which statement correctly describes the bonding in metals?
A lattice of negative ions in a 'sea of electrons'
A lattice of positive ions in a 'sea of electrons'
A lattice of neutral atoms with delocalised electrons
A lattice of negative ions with delocalised electrons
Which statement correctly describes the arrangement of atoms in silicon dioxide?
Each silicon atom is bonded to two oxygen atoms and each oxygen atom is bonded to one silicon atom.
Each silicon atom is bonded to four oxygen atoms and each oxygen atom is bonded to two silicon atom.
Each silicon atom is bonded to four oxygen atoms and each oxygen atom is bonded to four silicon atom.
Each silicon atom is bonded to two oxygen atoms and each oxygen atom is bonded to four silicon atom.
Metallic bonds are very strong and give metals their properties. Which of the following definitions is correct for a metallic bond?
A metallic bond is formed by the electrostatic attraction that occurs due to electrons transfer between metal atoms.
A metallic bond is formed by the electrostatic attraction between the positive ions and the delocalised electrons.
A metallic bond is formed by the electrostatic attraction that occurs due to uneven sharing of electrons between metal atoms.
A metallic bond is formed by the intermolecular forces between the positive metal ions and the delocalised electrons.
Metals are malleable and ductile and can be hammered and pulled into useful shapes.
Which statement correctly explains these properties?
Layers of atoms in the metal lattice are rigid and held strongly together so they cannot move.
Layers of atoms in a metal can slide over one another and break the attractive forces that hold them together.
Layers of atoms in a metal can slide over one another and new attractive forces are formed between the metal ions and the delocalised electrons.
Layers of atoms in a metal cannot slide over one another and the attractive forces between the metal ions and the delocalised electrons are unbreakable.
The ionic lattice structure of potassium chloride is shown below.
Which of the following statement best describes the bonding and structure of KCl?
A small lattice structure held together by electrostatic forces between oppositely charged ions which act in all directions.
A small lattice structure held together by electrostatic forces between like charged ions which act in all directions.
A giant lattice structure held together by electrostatic forces between oppositely charged ions which act in all directions.
A giant lattice structure held together by electrostatic forces between oppositely charged ions which act in one direction only.
