7 Periodic Table

In the Periodic Table the elements are arranged in order of their

Which row shows the properties of a Group I metal?

What is the trend of melting point down Group I?

• increases

• decreases

What is the trend of melting point down Group VII?

• increases

• decreases

Lithium and potassium are Group I elements.

Which element reacts more vigorously with water?

• lithium

• potassium

Lithium and potassium are Group I elements.

Which element reacts more vigorously with water?

• lithium

• potassium

Which trends in reactivity occur when moving down Group I and Group VII of the Periodic Table?

Which of the following shows the effect of the element bromine on potassium iodide solution?

• turns dark brown

• no visible reaction

• turns light red brown

Answer explanation

iodine is less reactive than bromine, hence iodine is displaced fom its salt solution

Astatine is at the bottom of Group VII in the Periodic Table.

What is the colour and state of Astatine at r.oom temperature?

• red-brown & solid

• black & solid

• black & liquid

• brown & solid

Each of the halogens, X₂, Y₂ and Z₂ was added to samples of aqueous solutions containing the ions of the other two halogens. The table shows the results.

What is the order of reactivity of the halogens?

• X is most reactive,

  Z is least reactive.

• Z is most reactive,

  X is least reactive.

• Y is most reactive,

  X is least reactive.

• X is most reactive,

  Y is least reactive.

Answer explanation

X can displace all other elements (Y & Z) from their salt solutions.