Cada pregunta de este test está cronometrada.
True or false? All atoms take part in reactions in order to achieve the structure of a noble gas.
Which type of bonding involves the sharing of electrons?
Covalent
Ionic
Which type of bonding involves the transfer of electrons?
True or false? Atoms which lose electrons become negatively charged ions.
Which of the following metals would lose two electrons to form a 2+ ion?
Sodium (Na)
Magnesium (Mg)
Aluminium (Al)
Potassium (K)
Calcium (Ca)
What holds ions together?
Electrostatic forces of attraction
Small invisible bridges
Nothing - they remain free-form
True or false? The structure of ionic compounds can be described as a giant lattice.
What type of diagram can we use to represent ionic bonding?
Van der Waals diagrams
Dot-and-cross diagrams
Lewis diagrams
True or false? The formula of an ionic compound represents the number of each atom in a molecule.
Which of these is the correct formula for barium iodide?
BaI
Ba2I
BaI2
Which of these is the correct formula for potassium phosphate?
KPO4
K3PO4
K(PO4)3
Which of these is the correct formula for iron (III) sulphate?
FeSO4
Fe2(SO4)3
Fe3(SO4)2
Between which two types of element do covalent bonds occur?
Metal and metal
Metal and non-metal
Non-metal and non-metal
How many electrons does a single covalent bond involve?
One
Two
Three
Four
True or false? The diatomic molecule of oxygen is made through a triple covalent bond.
True or false? Silica is a giant covalent macromolecule.
True or false? Metals do not form crystals because they are arranged in regular layers.
How can we describe the structure of a metal?
Simple molecule
Macromolecule
Giant lattice
What do metal atoms use to form metallic bonds?
Inner electron(s)
Neutron(s)
Outer electron(s)
True or false? Metals are strongly, electrostatically, attracted to the sea of delocalised electrons.