Reactivity Trends

• How metallic reactivity changes across a period and down a group.
• How non-metal reactivity (like halogens) changes down a group.
• Using displacement reactions to compare reactivity of metals.

1. Metal reactivity down a group — increases (e.g. Group 1: Li < Na < K) because the outer electron is farther from the nucleus and easier to lose.
2. Metal reactivity across a period — decreases left to right as elements become less metallic and more non-metallic.
3. Non-metal (halogen) reactivity down a group — decreases (e.g. F > Cl > Br > I) because it gets harder to attract one more electron as atoms get bigger.
4. Displacement reaction rule — a more reactive element displaces a less reactive element from its salt solution.
5. Reactivity series — a ranked list of metals from most to least reactive, used to predict which reactions will occur.

Will iron (Fe) displace copper from copper sulfate solution (CuSO4)?

Step 1 — Locate Fe and Cu on the reactivity series.
Step 2 — Iron is above copper (more reactive).
Step 3 — A more reactive metal displaces a less reactive one from its salt solution.
Step 4 — Yes: Fe + CuSO4 -> FeSO4 + Cu.

• Mixing up metal and non-metal trends — metals get MORE reactive down a group, halogens get LESS reactive down a group.
• Forgetting that reactivity across a period decreases as you move from metals to non-metals.
• Assuming any metal can displace any other — only a more reactive metal displaces a less reactive one.

• Which is more reactive, K or Na?
• Which is more reactive, F or I?
• Will zinc displace silver from silver nitrate solution?

Open the Practice tab for graded questions on Reactivity Trends.

• Use the platform-native live simulation or PhET-style tool for this topic (number line, Venn, physics playground, molecule builder, sensor dashboard, etc.).
• Mirror / body / home activity: physically do the concept (count objects, measure, role-play) and photograph or describe for portfolio.
• Voice or text reflection with AI Mentor: explain the concept to a younger student or family member.

• "Explain this concept to a Class 6 student using one real example from an Indian home, school, market, or festival."
• "What is one common mistake students make here, and how would you catch yourself making it?"
• Stretch: "How does this connect to coding, robotics, money, health, environment, or a future career?"

• Complete the core practice + one extension activity (photo, table, short reflection, or mini-project) for base XP + topic badge.
• 5-7 day streak or family discussion note = multiplier + visible artifact in parent/principal dashboard.
• Best real-world application stories (anonymised) featured on class or national leaderboard.

• One hands-on project or measurement using the Drishti kit or household items that makes the concept physical.
• Direct link to at least one Future Skill track (Money Management, Green Tech, Cyber Defenders, Micro-Entrepreneurship, AI Mastery, Sustainable Living, Personality Development).
• Coding extension where relevant (simple script, simulation, or data logging).

This material emphasises experiential "learning by doing", competency (apply/create/analyse), vocational exposure, critical thinking, and multidisciplinary connections. Designed to feed live worlds, AI Mentor (with memory), gamification, robotics, parent analytics, and future skills — not just exam prep.

Portfolio Evidence Idea: Your photo/table/reflection/project + one sentence on "How this helps me in real life or a possible future path."

Open the Practice tab for aligned questions (easy/medium/hard + case-based) with full AI scaffolding.

See curriculum for cross-links and the full future-skills/robotics chapters.