Year 8 Science · Unit 2 · Lesson 12
Foundation Worksheet
Learning Goals
Fill the gap
Choose the correct word from the word bank to complete the passage below.
The periodic table is organised into two key directions. A is a vertical column of elements, and elements in the same column share similar chemical properties. A is a horizontal row, and the row number tells you how many electron the elements in that row have. Group 1 is called the metals; they include lithium, sodium and potassium, and are highly they all react vigorously with water. At the other end of the table, Group 17 is called the group; these are non-metals that readily form salts. Group 18, the gases, are almost completely unreactive and are used in lighting because they do not easily combine with other substances.
Match each term to its description
Write the letter of the correct description next to each term in the "Your answer" column.
| Term | Your answer | Description |
|---|---|---|
| Group 1, Alkali metals | A. Highly reactive metals including lithium, sodium and potassium; all react vigorously with water | |
| Group 17, Halogens | B. Very reactive non-metals that readily form salts; include fluorine, chlorine and bromine | |
| Group 18, Noble gases | C. Almost completely unreactive gases used in lighting; found at the far right of the periodic table | |
| Period | D. A horizontal row in the periodic table; its number equals the number of electron shells | |
| Group | E. A vertical column in the periodic table; elements in the same column share similar chemical properties | |
| Position | F. Where an element sits in the periodic table, described by its group and period number |
1. State the difference between a group and a period in the periodic table.
2. Name one element from Group 1 and one element from Group 17. For each, state one chemical property.
Wrap Up
In one sentence, what was the main idea of this lesson?