Science Matter & Materials Conceptual 11–12 yrs

The Periodic Table

元素周期表

Description

Describe the organisation of the periodic table into periods and groups, explain the contribution of Mendeleev, and use the table to identify metals, non-metals, and predict patterns in reactivity

Mastery Evidence

✓ Explains why the periodic table is arranged into periods (rows) and groups (columns)
✓ States that elements in the same group have similar chemical properties
✓ Locates metals, non-metals, and metalloids in the periodic table
✓ Explains how Mendeleev ordered elements by atomic weight and predicted missing elements

Assessment Prompt

If your child was looking at a periodic table, could they explain why elements in the same column tend to behave similarly — and say what Mendeleev did that made it so useful to chemists?