Atoms Combining
Review the essentials and check your understanding after your teacher’s explanation.
From atoms to ions原子如何变成离子
Follow electron transfer and see why opposite ions attract.
Complete this core task when your teacher assigns the topic. Use the short recall cards before class.按老师指定的知识点完成网页预习，周内用提示卡回忆；不是整章预习。
Bonding Quest
Build ions, sort structures and fix mistakes. Play at home, with up to 30 minutes each day.
Play Chapter 4Choose a topic
Compounds and ions
Distinguish mixtures from compounds and explain how ions form.
Ionic bonding and lattices
Explain electron transfer and the attraction between oppositely charged ions.
Writing ionic formulae
Use ion charges to work out the simplest whole-number ratio in an ionic formula.
Covalent bonds
Use shared electron pairs to draw simple covalent molecules.
Multiple bonds and larger molecules
Draw the Extended covalent molecules and check their bonding and lone pairs.
Ionic and molecular properties
Use structure, attractions and mobile charged particles to explain properties.
Giant covalent structures and metals
Relate bonding and structure to the properties and uses of diamond, graphite, silica and metals.
Consolidation practice
Charge balance, bonding diagrams and explanations of properties.
Printable worksheets
Guided Worksheet
6 lessons with teacher modelling, partner checks and hint-card references.
Download DOCX ↓Printable hint cards
Use a card when you need a starting step, then return to the question. Chapter 4 cards are on pages 5–6 of the collection. Print the relevant pages and cut out the cards you need.
Download hint cards DOCX ↓