Periodic Table Mastery Worksheet

Name:

Date:

📚 Part 1: Knowledge & Definitions

Success criteria: I can recall the first 20 elements by name or symbol; I can write electron configurations for selected atoms; I can define element, compound and molecule in my own words.

1. List the first 20 elements. For each number 1–20 write either the element name or its chemical symbol (your choice). Use the space provided to complete all 20 entries.

1. ____ 2. ____ 3. ____ 4. ____ 5. ____ 6. ____ 7. ____ 8. ____ 9. ____ 10. ____

11. ____ 12. ____ 13. ____ 14. ____ 15. ____ 16. ____ 17. ____ 18. ____ 19. ____ 20. ____

2. Electron configuration: Write the full electron configuration (using shells or notation such as 1s2 2s2 2p6...) for these three atoms (all are within the first 20 elements):

a) Carbon (Z = 6) b) Neon (Z = 10) c) Calcium (Z = 20)

3. Definitions: In one or two sentences for each, define the following terms:

a) Element

b) Molecule

c) Compound

✏️ Part 2: Apply & Explain

Success criteria: I can identify substances as element/compound/molecule; I can explain a metal property and justify whether a change is chemical or physical; I can write word equations for common reactions and describe a test for CO₂.

5. Metals: Name one property of metals and explain why that property makes the metal valuable (for example in construction, wiring, or jewellery).

6. Chemical or physical? For each example, state whether it is a chemical reaction or a physical change and justify your answer in one sentence.

a) Iron rusting when left outside

b) Melting ice into water

7. Write word equations for each reaction type (use general examples):

a) Acid + hydroxide → ________

b) Acid + carbonate → ________

c) Complete combustion of a hydrocarbon → ________

d) Incomplete combustion of a hydrocarbon → ________

8. Testing for carbon dioxide: Explain a simple classroom test for CO₂ and state the expected observation (what you would see).

Differentiation strategies: Provide a printed list of first 20 elements for students who need support; offer one-on-one modelling or sentence starters for written answers; extend advanced learners by asking for ionic charges or isotopes of selected elements.

Dyslexia-friendly reading options: Use a larger sans-serif font, increased line spacing, and provide coloured overlays or high-contrast handouts on request; supply audio recordings of the worksheet instructions and key vocabulary.