column on the pericol tabie iOus Ciou f States that the properties of elements repeat in a recurring pattern when ordered by increasing, atomic number 2 The ions of six metals are investigated in x metals are investigated in this experiment. Name the six. Calaium ion Lithiu lon Skont Iom On 3 When performing a flame test, which element i s often present as an impurity? How can the presence of this impurity be distinguished from its presence as a primary component of a solu he ions of three halogens are investigated in this experiment. Name the three halogens. ne on ne ion Solution Sodium is often present as an impurity. In most of the flame test for other elements sodium impurities would give a yellow colour to the flame. However presence of Sodium as a main component of the solution and as an impurity can be easily determined by observing the intensity of the flame. The presence of Sodium in bulk amount in a mixture will give an intense bright Yellow colour to the flame. But Sodium impurities only gives a dull yellow colour. Use of a Cobalt glass can filter the yellow colour produced by sodium impurity from the flame test. .

1. column on the pericol tabie iOus Ciou f States that the properties of elements repeat in a
recurring pattern when ordered by increasing, atomic number 2 The ions of six metals are
investigated in x metals are investigated in this experiment. Name the six. Calaium ion Lithiu lon
Skont Iom On 3 When performing a flame test, which element i s often present as an impurity?
How can the presence of this impurity be distinguished from its presence as a primary
component of a solu he ions of three halogens are investigated in this experiment. Name the
three halogens. ne on ne ion
Solution
Sodium is often present as an impurity. In most of the flame test for other elements sodium
impurities would give a yellow colour to the flame. However presence of Sodium as a main
component of the solution and as an impurity can be easily determined by observing the intensity
of the flame. The presence of Sodium in bulk amount in a mixture will give an intense bright
Yellow colour to the flame. But Sodium impurities only gives a dull yellow colour. Use of a
Cobalt glass can filter the yellow colour produced by sodium impurity from the flame test.