Theory

CH12 - THE PERIODIC TABLE

Which statement describes the trends going down group VII of the Periodic Table?A. The boiling point and melting point both decrease.B. The boiling po...

2009 Summer

Theory

CH12 - THE PERIODIC TABLE

An inert atmosphere is needed in a lamp to lengthen the useful life of the metal filament.Why is argon, rather than helium, used for this purpose?[Tab...

2009 Summer

Theory

CH12 - THE PERIODIC TABLE

The sulfate of element F is green.Which other properties is element F likely to have?[Table_1]

2009 Summer

Theory

CH12 - THE PERIODIC TABLE

Which statement describes the trends going down group VII of the Periodic Table? A The boiling point and melting point both decrease. B The boiling ...

2009 Summer

Theory

CH12 - THE PERIODIC TABLE

The sulfate of element F is green.Which other properties is element F likely to have?[Table_1]densitymelting pointAhighhighBhighlowClowhighDlowlow

2009 Summer

Theory

CH12 - THE PERIODIC TABLE

The following is a list of the electron distributions of atoms of unknown elements.[Table_1]element | electron distributionA | 2,5B | 2,8,4C | 2,8,8,2...

2009 Summer

Theory

CH12 - THE PERIODIC TABLE

The diagram shows the position of an element X in the Periodic Table.What is the correct classification of element X and its oxide?Xoxide of XAmetalac...

2009 Winter

Theory

CH12 - THE PERIODIC TABLE

Astatine is an element in Group VII of the Periodic Table. It has only ever been produced in very small amounts. What is the best description of its l...

2009 Winter

Theory

CH12 - THE PERIODIC TABLE

Elements in Group 0 of the Periodic Table have uses.These noble gases are ......1...... and this explains why argon ......2...... be used in lamps.Whi...

2009 Winter

Theory

CH12 - THE PERIODIC TABLE

The table gives information about four elements.[Table_1]Which element is a transition metal?

2009 Winter

Theory

CH1 - STATES OF MATTER

Which diagram shows the process of diffusion?[Image_1: A, B, C, D diagrams with different atoms]

2012 Summer

Theory

CH2 - SEPARATING SUBSTANCES

Which method is most suitable to obtain zinc carbonate from a suspension of zinc carbonate in water?A) crystallisationB) distillationC) evaporationD) ...

2012 Summer

Theory

CH10 - THE SPEED OF A REACTION

A student investigates how the concentration of an acid affects the speed of reaction with a 0.5 g mass of magnesium at 30°C.The student has a beaker...

2012 Summer

Theory

CH3 - ATOMS AND ELEMENTS

An element Y has the proton number 18.The next element in the Periodic Table is an element Z.Which statement is correct?A. Element Z has one more elec...

2012 Summer

Theory

CH3 - ATOMS AND ELEMENTS

Which atom has twice as many neutrons as protons?A: $^1_1\text{H}$B: $^2_1\text{H}$C: $^3_1\text{H}$D: $^4_2\text{He}$

2012 Summer

Theory

CH4 - ATOMS COMBINING

Which is a simple covalent molecule?[Table_1]

2012 Summer

Theory

CH4 - ATOMS COMBINING

The electronic structures of atoms P and Q are shown.P and Q react to form an ionic compound.What is the formula of this compound?A. PQ2B. P2QC. P2Q6D...

2012 Summer

Theory

CH4 - ATOMS COMBINING

The diagrams show the structures of two forms, P and Q, of a solid element.What are suitable uses of P and Q, based on their structures?[Table_1]| |...

2012 Summer

Theory

CH5 - REACTING MASSES AND CHEMICAL EQUATIONS

The equation for the reaction between magnesium and dilute sulfuric acid is shown.$$\text{Mg } + \text{ H}_2\text{SO}_4 \rightarrow \text{MgSO}_4 + \t...

2012 Summer

Theory

CH1 - STATES OF MATTER

Winston Churchill, a British Prime Minister, had his false teeth electroplated with gold. The teeth were coated with a thin layer of carbon and were t...

2012 Summer