🔬 Part 1: Predicting Chemical Behaviour

1. Based on their position in the periodic table, which element would be most reactive with water?

Sodium (Na) - Group 1

Magnesium (Mg) - Group 2

Aluminium (Al) - Group 13

Carbon (C) - Group 14

2. Explain your reasoning for question 1 using your knowledge of the periodic table:

3. Predict what type of ion calcium (Ca) would form based on its position in Group 2:

Ca⁺ (loses 1 electron)

Ca²⁺ (loses 2 electrons)

Ca⁻ (gains 1 electron)

Ca²⁻ (gains 2 electrons)

4. Fill in the blanks about reactivity trends:

As you move down Group 1 (alkali metals), the elements become ________ reactive. This is because the outer electrons are ________ from the nucleus, making them ________ to lose.

🌱 Part 2: Real-World Applications

5. Match each field with how they use the periodic table:

1. Medicine

2. Agriculture

3. Construction

4. Environmental Science

A. Choosing metals for building materials

B. Understanding pollutant behaviour

C. Selecting elements for pharmaceuticals

D. Determining fertiliser composition

6. Which elements are commonly found in fertilisers? (Check all that apply)

Nitrogen (N)

Phosphorus (P)

Potassium (K)

Gold (Au)

Helium (He)

7. Explain why aluminium is often chosen over iron for aircraft construction:

⚗️ Part 3: Chemical Reactions and Predictions

8. Predict the products when sodium (Na) reacts with chlorine (Cl₂):

Na + Cl₂ → _______________

9. What type of bond would form between sodium and chlorine?

Ionic bond

Covalent bond

Metallic bond

Hydrogen bond

10. Using the periodic table, predict which of these reactions would be most vigorous:

Lithium + water

Sodium + water

Potassium + water

Rubidium + water

11. Draw a simple diagram showing the electron arrangement for a sodium atom and explain how this helps predict its chemical behaviour:

🧪 Part 4: Problem Solving with the Periodic Table

12. A chemist needs to choose an element for a new medication that will easily form positive ions. Based on the periodic table, which group would be the best choice?

Group 1 (alkali metals)

Group 17 (halogens)

Group 18 (noble gases)

Group 14 (carbon group)

13. Explain how understanding an element's position in the periodic table helps chemists predict its chemical behaviour:

14. Complete the following statement about valence electrons:

Elements in the same ________ have the same number of ________ electrons, which explains why they have similar ________ properties.

15. Give one example of how the periodic table is used in environmental science and explain why this application is important: