Periodic-Table

Element R reacts with chlorine to form a coloured ionic compound with the formula RCl₃. RCl₃ acts as a catalyst in some reactions. Which statement about element R is correct?

• It conducts electricity only when molten.

• It is a transition element.

• It has a low melting point.

• It has a low density.

The positions of four elements are shown in the outline of the Periodic Table.

Which element has a high melting point and forms coloured compounds?

• A

• B

• C

• D

Metal X reacts rapidly with steam but only very slowly with cold water.

What is X?

• copper

• iron

• magnesium

• sodium

The noble gases make up Group VIII of the Periodic Table.

Which statement is correct?

• Argon exists as non-bonded atoms.

• Krypton is very poisonous.

• Neon burns in pure oxygen with a red flame.

• The chemical formula of helium is He₂.

Part of the Periodic Table is shown.

The letters are not the symbols of the elements.

Which element is a non-metal?

• A

• B

• C

• D

Element X is a very soft solid.

It reacts violently with water.

A purple flame is seen as it reacts with water.

What is X?

• iodine

• potassium

• sodium

• zinc

Iron occurs in the ground as iron oxide.

Gold occurs in the ground as the element.

Which statement explains this observation?

• Gold is more reactive than iron.

• Gold oxide is more reactive than iron oxide.

• Iron is more reactive than gold.

• Iron oxide is more reactive than gold oxide.

Which row describes the reactivity and the electronic structure of a noble gas?

• A

• B

• C

• D

Two non-metallic elements, X and Y, are in the same group of the Periodic Table.

X is higher in the group than Y.

Which row shows the group number that includes elements X and Y and which element is lighter

in colour?

• A

• B

• C

• D

Which row describes a Group I element?

• A

• B

• C

• D