27 Revising the Periodic Table 14-16

In this activity, students use a concept map linking key words about the Periodic table. They discuss relationships between words thus exploring and revealing their own understanding.

This resource is best used for revising and consolidating knowledge about the Periodic Table.

## Learning objectives

Students will be able to:

• understand and explain the way in which elements are arranged in the Periodic Table.

## Assessment for learning commentary

Initially sparking words connected with the Periodic Table establishes a communication channel for explaining the learning objectives.

Students mainly self-assess, buoyed by the result of discussion with their peers. This is progressive during the activities.

The plenary enables the teacher to gain a clear picture of what ideas the whole class finds most demanding and to ensure that all students recognise the standards they are aiming for. This is reinforced by the comments written by the teacher, on the Worksheets.

## Resources

For each student

 Revision map for the Periodic Table (see Acknowledgement) Revising the Periodic table: Worksheet

## Some suggested sentences linking the words in boxes

 1 The Periodic Table is a way of arranging what we know about chemical elements. 2 Elements are arranged in rows in the Periodic Table. 3 The rows of elements are called periods. 4 Different elements contain different numbers of protons. 5 Each element has a different atomic number. 6 The number of protons in an atom is its atomic number. 7 There are the same number of protons as electrons in a neutral atom. 8 Elements with the same number of electron shells are in the same period. 9 Elements are arranged in columns in the Periodic Table. 10 Electrons are arranged in shells. 11 The columns are called groups. 12 Elements in the same group have the same number of electrons in the outer shell. 13 Electrons in the outer shell but not other shells are involved in bonding atoms together. 14 Elements in the same group have similar properties. 15 The chemical properties of an element depend upon the number of electrons in the outer shell. 16 Alkali metals all have similar properties. 17 Elements in Group 1 of the Periodic Table are called the Alkali Metals. 18 Elements in group VII of the Periodic Table are called the Halogens. 19 Sodium is an alkali metal. 20 Chlorine is a halogen. 21 Sodium reacts with chlorine to form sodium chloride. * 22 Chlorine reacts with sodium to form sodium chloride. *

*Note: these do not test the Periodic Table

## Acknowledgement

K. Taber, Chemical misconceptions – prevention, diagnosis and cure, Volume 2: classroom resources, Revising the Periodic Table. London: Royal Society of Chemistry, 2002.