Practice Structure 2. Models of bonding and structure with authentic IB Chemistry exam questions for both SL and HL students. This question bank mirrors Paper 1A, 1B, 2 structure, covering key topics like atomic structure, chemical reactions, and organic chemistry. Get instant solutions, detailed explanations, and build exam confidence with questions in the style of IB examiners.
Sodium chloride is an example of an ionic compound.
State the type of bonding in sodium chloride.
Identify the ions formed when sodium reacts with chlorine.
Describe the electrostatic interaction that holds the lattice together.
Electrical and thermal conductivity depend on the mobility of electrons in metals.
Explain why transition metals are generally better conductors than alkali metals.
Compare the electrical conductivity of , , and , and justify your order.
Suggest one use of a highly conductive transition metal and explain why it is suitable.
Lithium, sodium, and potassium are Group 1 metals.
State the trend in melting point down Group 1.
Suggest how the number of delocalized electrons compares in these metals.
Explain the trend in melting point based on bonding.
Carbon is an element with several allotropes, each with distinct physical and electrical properties. Two common forms are diamond and graphite, which have very different uses in technology and industry.
Describe the bonding and structure of diamond in terms of its geometry and bonding type.
Describe the bonding and structure of graphite and how its layers are arranged.
Explain, in terms of electronic structure, why graphite conducts electricity whereas diamond does not.
State one technological use for each allotrope and relate it to a property explained above.
Hydrogen cyanide () is a toxic gas used in chemical synthesis and historically known for its lethal effects. Understanding its bonding and polarity helps explain its reactivity and behavior in biological systems.
Draw the Lewis (electron dot) structure of , showing all bonds and lone pairs.
Predict the shape of the molecule using VSEPR theory.
Explain whether is a polar molecule, referring to bond polarity and molecular geometry.
Suggest how the polarity of influences its solubility in water.
Which substance dissolves in water to form a solution that does not conduct electricity?
What is the primary reason why alloys are generally stronger than pure metals?
What is the formal charge of the oxygen atom in ?
Which metal has the strongest metallic bond?