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...

2010 Summer

Theory

CH2 - SEPARATING SUBSTANCES

A fruit drink coloured orange contains a dissolved mixture of red and yellow colouring agents. One of these colouring agents is suspected of being ill...

2010 Summer

Theory

CH1 - STATES OF MATTER

A student carries out an experiment to find how fast 3 cm pieces of magnesium ribbon dissolve in 10 cm³ samples of sulfuric acid at different tempera...

2010 Summer

Theory

CH4 - ATOMS COMBINING

Which row shows the change that takes place when element X gains the new particle shown?[Table_1]Table 1| | particle gained | change || --- ...

2010 Summer

Theory

CH3 - ATOMS AND ELEMENTS

The diagram shows an atom.key𝑒 electronnucleus containing nine particlesWhat is the proton number and neutron number of the atom?[Table_1]| | ...

2010 Summer

Theory

CH3 - ATOMS AND ELEMENTS

The symbols of two atoms may be written as shown.$$^{52}_{23}\text{X} \quad {}^{52}_{24}\text{Y}$$Which statement about these atoms is correct?A. They...

2010 Summer

Theory

CH14 - MAKING USE OF METALS

Which name is given to mixtures of metals?A. alloysB. compoundsC. oresD. salts

2010 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 ionB by losing six electrons ...

2010 Summer

Theory

CH4 - ATOMS COMBINING

In which compounds are pairs of electrons shared between atoms?1. sodium chloride2. methane3. lead bromideA 1 only B 2 only C 1 and 3 D 1, 2 and 3

2010 Summer

Theory

CH5 - REACTING MASSES AND CHEMICAL EQUATIONS

Hydrogen and chlorine react as shown.What is the equation for this reaction?A. $2H + 2Cl \rightarrow 2HCl$B. $2H + 2Cl \rightarrow H_2Cl_2$C. $H_2 + C...

2010 Summer