The variation of the atomic properties

Purpose;

To use the data collection, to build graphs of the variation of a property against the atomic number.

1) Graphing atomic radius

In this exercise you will plot a graph of atomic radius against the atomic number of the elements. You will examine the graph to find out whether there are any regular variations in the property.

Using the data given in the Table(next page) plot the graph for the atomic radius against the atomic number. Join consecutive points with solid straight lines. When datum for an element is missing, join the points by a broken straight line

2) Graphing Electronegativity.

You will plot a graph of electronegativity against atomic number. Using electronegativity values in the periodic table, plot a point graph of electronegativity against the atomic number for the first 36 elements. Draw the graph line.

Part B

2. What do you estimate to be the missing value of the electronegativity for element #15? Show on the graph how did you find the missing value

Electronegativity _____________

3. Using a periodic table, select an appropriate element that satisfies the condition given

particle with the larger radius : Ca²⁺ ion or Mg²⁺ ion. ____________

halogen with the highest IE. _____________

element with the highest EA in Gr16: ________________

As you go from left to write across a period, the electron affinity (decreases/ increases). ____________________

Arrange the following elements in order of increasing the atomic radius.

Sc, Ga, Co _____________________

Arrange the following elements in order of increasing reactivity.

S, Te, O, _______________________

Data: Data