IGCSE chemistry periodic table T

Use the Periodic Table to help you answer these questions.

State the symbol of the element that has the atomic number of 12

Use the Periodic Table to help you answer these questions.

State the symbol of the element that has a relative atomic mass of 12. (1)

State the number of the group that contains the noble gases (1)

Which group contains elements whose atoms form ions with a 2+ charge? (1)

Which group contains elements whose atoms form ions with a 1- charge? (1)

The table gives information about the first three elements in Group 1 of the Periodic Table

(a) Which information shows that the elements have similar chemical properties?

Give a reason for your choice. (2)

Information

Reason

The elements in Group 1 show a clear trend (regular pattern) in some of their physical properties.

Identify the physical property that shows a clear trend. (1)

The elements also show a clear trend in their chemical properties, such as their reaction with water.When a small piece of lithium is added to water it fizzes gently and eventually disappears to form a solution.

Describe a test to show that the gas given off is hydrogen (1)

(i) Complete the equation for the reaction by inserting the state symbols.

2Li ( ) + 2H2O ( ) → 2LiOH ( ) + H2 ( )

State and explain the effect that the solution formed has on red litmus paper (1 + 2)

State two similarities and two differences between the reactions of lithium and potassium

with water. (4)

Similarities

Differences