Theory

CH1 - ATOMS, MOLECULES & STOICHIOMETRY

Vanadium, niobium and tantalum are metals in the same group of the Periodic Table.(a) The shorthand electronic configuration of vanadium in the ground...

2024 Winter

2

Theory

CH1 - ATOMS, MOLECULES & STOICHIOMETRY

Cobalt, rhodium and iridium are metals in the same group of the Periodic Table. (a) The shorthand electronic configuration of cobalt is [Ar]3d\(^7\)4s...

2024 Winter

2

Theory

CH1 - ATOMS, MOLECULES & STOICHIOMETRY

Cobalt, rhodium and iridium are metals in the same group of the Periodic Table.(a) The shorthand electronic configuration of cobalt is [Ar]3d^7 4s^2.(...

2024 Winter

3

Theory

CH1 - ATOMS, MOLECULES & STOICHIOMETRY

(a) (i) Describe the trend in the solubility of the hydroxides of magnesium, calcium and strontium.Explain your answer...................................

2024 Summer

2

Theory

CH1 - ATOMS, MOLECULES & STOICHIOMETRY

(a) When NaOH(aq) is added to an aqueous solution containing [Co(H2O)6]2+ a precipitation reaction occurs accompanied by a colour change.In this react...

2024 Winter

4

Theory

CH1 - ATOMS, MOLECULES & STOICHIOMETRY

(a) (i) Describe the trend in the solubility of the hydroxides of magnesium, calcium and strontium.Explain your answer...................................

2024 Summer

2

Theory

CH1 - ATOMS, MOLECULES & STOICHIOMETRY

Copper is used in electrical equipment. It has a melting point of 1085°C.(a) (i) Identify the lattice structure of copper...............................

2023 Summer

2

Theory

CH1 - ATOMS, MOLECULES & STOICHIOMETRY

The Group 2 elements Mg to Ba are all silvery-white reactive metals.(a) (i) Draw a labelled diagram to show the bonding and structure of the Group 2 m...

2023 Spring

2

Theory

CH1 - ATOMS, MOLECULES & STOICHIOMETRY

(a) The reaction of pure aluminium is only observed if the aluminium oxide layer is removed first. When pure aluminium is added to cold water, bubbles...

2023 Summer

2

Theory

CH1 - ATOMS, MOLECULES & STOICHIOMETRY

The melting points of some solids are shown in Table 1.1.[Table_1](a) (i) State the type of bonding present in magnesium and in sodium chloride. bondi...

2023 Summer

2

Theory

CH2 - ATOMIC STRUCTURE

(a) Complete the table to show the composition and identity of some atoms and ions.[Table]name of element | nucleon number | atomic number | number of...

2016 Summer

1

Theory

CH4 - STATES OF MATTER

D, E, F, and G are four consecutive elements in the fourth period of the Periodic Table. (The letters are not the actual symbols of the elements.)D is...

2016 Summer

1

Theory

CH10 - GROUP 2

The elements in Group 2, and their compounds, show many similarities and trends in their properties.(a) Magnesium, calcium, strontium and barium all r...

2016 Summer

1

Theory

CH14 - AN INTRODUCTION TO ORGANIC CHEMISTRY

This question is about molecules with molecular formula $C_4H_8$.(a) Give the structures of a pair of **positional** isomers with the formula $C_4H_8$...

2016 Summer

1

Theory

CH22 - ANALYTICAL TECHNIQUES

(a) Complete the diagram to show the mechanism of reaction 1. Include all necessary charges, partial charges, lone pairs and curly arrows.H3C—C—Br...

2016 Summer

Theory

CH2 - ATOMIC STRUCTURE

(a) Complete the table to show the composition and identity of some atoms and ions.[Table_1]name of element | nucleon number | atomic number | number ...

2016 Summer

2

Theory

CH5 - CHEMICAL ENERGETICS

The elements in Group 17, the halogens, and their compounds, show many similarities and trends in their properties. Some data are given for the elemen...

2016 Summer

3

Theory

CH6 - ELECTROCHEMISTRY

Acidified potassium dichromate(VI) can oxidise ethanedioic acid, $H_2C_2O_4$. The relevant half-equations are shown. $$Cr_2O_7^{2-} + 14H^+ + 6e^- \r...

2016 Summer

2

Theory

CH22 - ANALYTICAL TECHNIQUES

This question is about molecules with molecular formula $C_4H_8O_2$.(a) Give the structural formulae of the pair of extbf{chain} isomers with the for...

2016 Summer

2

Theory

CH17 - HYDROXY COMPOUNDS

A reaction sequence based on propan-1-ol is shown. (a) Reactions 1 and 2 can both be carried out using the same reagents. (i) Identify suitable rea...

2016 Summer

2