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

The diagram shows a cup of tea. Which row describes the water particles in the air above the cup compared with the water particles in the cup?[Table_1...

2013 Summer

Theory

CH11 - ACIDS AND BASES

Crystals of sodium chloride were prepared by the following method.1 25.0cm3 of dilute hydrochloric acid was accurately measured into a conical flask....

2013 Summer

Theory

CH11 - ACIDS AND BASES

Lead iodide is insoluble in water.Lead iodide is made by adding aqueous lead nitrate to aqueous potassium iodide.Which pieces of apparatus are needed ...

2013 Summer

Theory

CH3 - ATOMS AND ELEMENTS

Element X is represented by $^{27}_{13}X$.Which statement about element X is correct?A. An atom of X contains 13 protons and 13 neutrons.B. An atom of...

2013 Summer

Theory

CH12 - THE PERIODIC TABLE

The positions of four elements are shown on the outline of the Periodic Table.Which element forms a coloured oxide?

2013 Summer

Theory

CH4 - ATOMS COMBINING

For which substance is the type of bonding \textbf{not} correct?[Table_1]The table contains the following:\begin{center}\begin{tabular}{|c|c|c|c|}\hli...

2013 Summer

Theory

CH4 - ATOMS COMBINING

Element X has six electrons in its outer shell. How could the element react? A by gaining two electrons to form a positive ion B by losing six elec...

2013 Summer

Theory

CH1 - STATES OF MATTER

The diagram shows an incomplete circuit. Which substance causes the lamp to light when added to the glass tube? A. aqueous sodium chloride B. aqu...

2013 Summer

Theory

CH5 - REACTING MASSES AND CHEMICAL EQUATIONS

A compound with the formula XF$_2$ has a relative formula mass of 78.What is element X?A) argonB) calciumC) neonD) zirconium

2013 Summer

Theory

CH13 - THE BEHAVIOR OF METALS

What is the balanced chemical equation for the reaction between calcium and water?A. $\text{Ca} + \text{H}_2\text{O} \rightarrow \text{CaOH} + \text{H...

2013 Summer