Theory

CH2 - ATOMIC STRUCTURE

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

CH2 - ATOMIC STRUCTURE

(a) (i) Explain the lack of reactivity of nitrogen gas, $N_2(g)$.........................................................................................

2024 Summer

4

Theory

CH2 - ATOMIC STRUCTURE

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

CH2 - ATOMIC STRUCTURE

(a) Table 3.1 shows some properties of two Group 14 elements, C and Sn, in their standard states. The table is incomplete.\begin{table} \centering \b...

2024 Winter

4

Theory

CH2 - ATOMIC STRUCTURE

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

CH2 - ATOMIC STRUCTURE

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

2024 Summer

3

Theory

CH2 - ATOMIC STRUCTURE

The elements silicon, phosphorus and sulfur are in Period 3 of the Periodic Table.(a) (i) Describe the variation in atomic radius from silicon to sulf...

2023 Winter

3

Theory

CH2 - ATOMIC STRUCTURE

(a) (i) Complete Table 1.1 to show the number of electrons in the 3p subshell and the total number of unpaired electrons in an atom of P, S and Cl. [2...

2023 Winter

3

Theory

CH2 - ATOMIC STRUCTURE

The Pauling electronegativity values of elements can be used to predict the chemical properties of compounds.Use the information in Table 1.1 to answe...

2023 Spring

2

Theory

CH2 - ATOMIC STRUCTURE

Tellurium is an element in Group 16. The most common isotope of tellurium is $^{130}\text{Te}$. Its electronic configuration is $[\text{Kr}]\;4d^{10}\...

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