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Science lesson plan · 10th grade (Year 11 in England) · 30 minutes

Ionic, covalent and metallic bonding

Atoms, elements and the periodic table

CCSS NGSS.HS-PS1-1CCSS NGSS.HS-PS1-3England: KS4 Combined Science: Structure, bonding and the properties of matter

Objective and success criteria

Students will: Ionic, covalent and metallic bonding.

  • I can answer questions on today's skill on my own, without help.
  • I can explain each step and say why it works.
  • I can check my answer and spot a mistake.

Before and after

Needs first: Electron shells and the periodic table

Leads to: the next skill in this area.

Materials: Periodic tables, Atom model kits, Mini whiteboards, A diagram or short video clip of the idea, Printed student sheet (below).

Warm-up · 4 min

  • Quick retrieval from earlier learning (Electron shells and the periodic table). Students answer on mini whiteboards.
  • Show answers together and note who needs support in the main task.
  1. How many electrons does an atom of boron (atomic number 5) have in its outer shell? → 3Prompt: Fill the shells 2, 8, 8 in order.
  2. Why does potassium react more vigorously with water than sodium? (It is a non-metal / It has fewer protons / It has a full outer shell / Its outer electron is further from the nucleus, so it is lost more easily) → Its outer electron is further from the nucleus, so it is lost more easilyPrompt: Potassium has one more shell than sodium.
  3. How many electrons does an atom of silicon (atomic number 14) have in its outer shell? → 4Prompt: Fill the shells 2, 8, 8 in order.

Hook · 3 min

  • Show the periodic table and ask what patterns students can see before anything is explained.
  • Share the objective: Ionic, covalent and metallic bonding. Read the success criteria together.

I do: model it · 7 min

  • Work through the example out loud, saying why you do each step, not just what you do.
  • Example: What type of bonding is in potassium bromide (KBr)?
  • Step 1: Ionic bonds form between metals and non-metals when electrons are transferred.
  • Step 2: So the answer is: ionic
  • Answer: ionic
  • Pause after each step and ask a student to say what comes next.

We do: guided practice · 6 min

  • Do these together. Students try each step on whiteboards before you reveal it.
  • Use the hints as prompts rather than giving the answer.
  1. What type of bonding is in potassium bromide (KBr)? (ionic / covalent / metallic) → ionicPrompt: Is it metal + non-metal, only non-metals, or only a metal?
  2. What is the charge on a aluminium (aluminum) ion? (+1 / −1 / −2 / +3) → +3Prompt: Metals lose their outer electrons and become positive.

You do: independent practice · 7 min

  • Students work on the student sheet. Circulate and check the first two answers of every student early.
  • Students who finish: write a question of their own for a partner, with the answer.

The 6 questions are on the student sheet below, with answers in the key.

Exit ticket · 3 min

  • Two questions on their own. Sort answers into got it / nearly / not yet to plan the next lesson.
  1. Bonding: which statement is NOT true? (Water has a high boiling point because its covalent bonds are weak. / Ionic compounds have high melting points. / Simple covalent substances such as water have low melting and boiling points. / Ionic compounds conduct electricity when melted or dissolved.) → Water has a high boiling point because its covalent bonds are weak.Prompt: Can ions move in a solid?
  2. What type of bonding is in magnesium metal? (ionic / covalent / metallic) → metallicPrompt: Is it metal + non-metal, only non-metals, or only a metal?

Watch out for

  • Everyday meanings of words getting in the way of the science meaning: define key words explicitly.
  • Remembering facts without the reason: ask "why?" and "what is the evidence?"

Support and stretch

Support

  • Review first: Electron shells and the periodic table.
  • Use concrete materials: periodic tables.
  • Give the first step of each question, or a partly worked example to finish.
  • Pair with a confident partner for the guided practice.

Stretch

  • Explain a common mistake in writing and how to fix it.
  • Write a word problem that uses today's skill, then solve a partner's.

Homework and more practice

Free online practice with hints and printable worksheets for this skill: eurekami.com/science/grade-10.

Free lesson plan from eurekami.com/lesson-plan-builder

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Ionic, covalent and metallic bonding

Name

Date

Score/ 6

  1. Question 1

    Bonding: which statement is NOT true?

    • A. Simple covalent substances such as water have low melting and boiling points.
    • B. Ionic compounds conduct electricity when melted or dissolved.
    • C. Ionic compounds have high melting points.
    • D. Water has a high boiling point because its covalent bonds are weak.

  2. Question 2

    What is the charge on a sodium ion?

    • A. +2
    • B. −2
    • C. +1
    • D. −1

  3. Question 3

    What type of bonding is in carbon dioxide (COâ‚‚)?

    • A. ionic
    • B. covalent
    • C. metallic

  4. Question 4

    What is the charge on a lithium ion?

    • A. +1
    • B. −2
    • C. +3
    • D. −1

  5. Question 5

    What type of bonding is in chlorine gas (Clâ‚‚)?

    • A. ionic
    • B. covalent
    • C. metallic

  6. Question 6

    What is the charge on a calcium ion?

    • A. +3
    • B. +2
    • C. +1
    • D. −2

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Answer key: Ionic, covalent and metallic bonding

  1. 1. D. Water has a high boiling point because its covalent bonds are weak.

  2. 2. C. +1

  3. 3. B. covalent

  4. 4. A. +1

  5. 5. B. covalent

  6. 6. B. +2