MCQ

CH2 - ATOMIC STRUCTURE

What could be the proton number of an element that has three unpaired electrons in each of its atoms?

2010 Summer

MCQ

CH2 - ATOMIC STRUCTURE

Use of the Data Booklet is relevant to this question.The elements radon (Rn), francium (Fr) and radium (Ra) have consecutive proton numbers in the Per...

2010 Summer

MCQ

CH2 - ATOMIC STRUCTURE

Sodium hydrogensulfide, NaSH, is used to remove hair from animal hides.Which statements about the $\text{SH}^-$ ion are correct?1. It contains 18 elec...

2010 Summer

MCQ

CH2 - ATOMIC STRUCTURE

What could be the proton number of an element that has three unpaired electrons in each of its atoms?

2010 Summer

MCQ

CH2 - ATOMIC STRUCTURE

Use of the Data Booklet is relevant to this question.The elements radon (Rn), francium (Fr) and radium (Ra) have consecutive proton numbers in the Per...

2010 Summer

MCQ

CH2 - ATOMIC STRUCTURE

Sodium hydrogensulfide, NaSH, is used to remove hair from animal hides. Which statements about the SH^- ion are correct? 1. It contains 18 electrons....

2010 Summer

Theory

CH2 - ATOMIC STRUCTURE

In the 19th and 20th centuries, experimental results showed scientists that atoms consist of a positive, heavy nucleus which is surrounded by electron...

2010 Summer

Theory

CH2 - ATOMIC STRUCTURE

The alkali metals are a series of six elements in Group I of the Periodic Table. The first ionisation energy of these elements shows a marked trend as...

2010 Summer

MCQ

CH2 - ATOMIC STRUCTURE

A simple ion X^+ contains eight protons. What is the electronic configuration of X^+?

2010 Winter

MCQ

CH2 - ATOMIC STRUCTURE

Which ion has more electrons than protons and more protons than neutrons? [H = $^{1}_{1}$H ; D = $^{2}_{1}$H ; O = $^{16}_{8}$O]

2010 Winter

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

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

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

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

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

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

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

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

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