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

CH2 - SEPARATING SUBSTANCES

Petroleum is a useful natural resource.The diagram shows how petroleum can be separated into useful substances.(a) What is the name of the separation ...

2020 Spring

Theory

CH11 - ACIDS AND BASES

Aluminium is extracted from its ore. The ore is converted into pure aluminium oxide, which then undergoes electrolysis as shown.(a) (i) Name an ore of...

2020 Spring

Theory

CH12 - THE PERIODIC TABLE

(a) Identify the element which is in Group VI and Period 4...............................................................................................

2020 Spring

Theory

CH13 - THE BEHAVIOR OF METALS

Iron is a typical transition element.Iron:● acts as a catalyst● forms coloured compounds● has more than one oxidation state.(a) Name one major i...

2020 Spring

Theory

CH18 - POLYMERS

There are two types of polymers.(a) Addition polymers are made from many identical small units. (i) What is the term used to describe these small unit...

2020 Spring

MCQ

CH1 - STATES OF MATTER

A mixture of ice and water is left to stand and the ice melts.Which row describes what happens as the ice is melting?[Table_1]temperature of mixture |...

2020 Summer

MCQ

CH1 - STATES OF MATTER

Which piece of apparatus should be used to measure exactly 21.4 cm$^3$ of water?

2020 Summer

MCQ

CH2 - SEPARATING SUBSTANCES

The chromatogram for an unknown dye is shown.What is the $R_f$ value of the dye?

2020 Summer

MCQ

CH3 - ATOMS AND ELEMENTS

The atomic number and nucleon number of a potassium atom are shown.[Table_1]How many protons, neutrons and electrons are in a potassium ion, K⁺?

2020 Summer

MCQ

CH3 - ATOMS AND ELEMENTS

The electronic structures of two atoms, P and Q, are shown. P and Q combine together to form a compound.What is the type of bonding in the compound an...

2020 Summer