All Johnstone's model articles

Resource

Bondio ïonig | Datblygu dealltwriaeth | 14–16 oed

Datblygu dealltwriaeth y dysgwyr o ddellt ïonig drwy gymharu cynrychioliadau 2D a 3D 

Resource

Decomposition of calcium carbonate | Johnstone’s triangle worksheets | 14–16 years

Think about reacting masses and gas volumes in the context of a decomposition reaction

Resource

Excess copper oxide | Johnstone’s triangle worksheets | 14–16 years

Explore the reaction of sulfuric acid with excess reactant copper oxide at three conceptual levels with Johnstone’s triangle

Resource

Determining unknown concentration | Johnstone’s triangle worksheets | 14–16 years

Guide learners to connect their thinking about calculating unknown concentrations following a titration

Resource

Concentration of acids | Johnstone’s triangle worksheets | 14–16 years

Learners connect their understanding of dissolved ions, concentration and how chemicals are labelled with this single-page worksheet

Resource

Concentration and moles | Developing understanding | 14–16 years

Support learners to develop secure mental models of how concentration is measured and calculated in mol/dm³

Resource

Relative atomic mass of boron | Johnstone’s triangle worksheets | 14–16 years

Use Johnstone’s triangle to help learners think about relative atomic mass and the abundance of different isotopes

Resource

Màs atomig cymharol boron | Taflenni gwaith triongl Johnstone | 14–16 oed

Defnyddiwch driongl Johnstone i helpu’r dysgwyr i feddwl am fàs atomig cymharol boron

Resource

Fertiliser yield | Johnstone’s triangle worksheets | 14–16 years

Help learners calculate the actual and theoretical yield of ammonium sulfate using Johnstone’s triangle

Resource

Sodium and chlorine reaction | Johnstone’s triangle | 11–14 years

Strengthen learners’ understanding of the connection between word equations and chemical reactions 

Resource

Balancing chemical equations using magnesium and oxygen | Johnstone’s triangle worksheets | 14–16 years

Introduce Johnstone’s triangle with these teacher notes and a student worksheet to help learners gain a deeper understanding of balancing chemical equations 

Resource

Moles of xenon | Johnstone’s triangle worksheets | 14–16 years

Introduce Johnstone’s triangle as a method of calculating the number of moles of xenon from a given volume of gas

Resource

Moles of gold | Johnstone’s triangle worksheets | 14–16 years

Connect macroscopic, sub-microscopic and symbolic understanding of calculations involving moles and mass with Johnstone’s triangle

Resource

Molau o aur | Taflenni gwaith triongl Johnstone | 14–16 oed

Cysylltu dealltwriaeth facrosgopig, is-ficrosgopig a symbolaidd o gyfrifiadau sy’n cynnwys molau a màs â thriongl Johnstone

Resource

Iron and sulfur reaction | Johnstone’s triangle | 11–14 years

Develop understanding of reactants and products at different conceptual levels using an iron and sulfur reaction as an example

Resource

Balancing chemical equations using hydrogen and oxygen | Johnstone’s triangle worksheets | 14–16 years

Introduce Johnstone’s triangle to help learners gain a deeper understanding of balancing chemical equations

Resource

Cydbwyso hafaliadau cemegol sy’n defnyddio hydrogen ac ocsigen | Taflenni gwaith triongl Johnstone | 14-16 oed

Cyflwyno triongl Johnstone i helpu’r dysgwyr i ddyfnhau eu dealltwriaeth o gydbwyso hafaliadau cemegol

Resource

Concentration of sodium hydroxide | Johnstone’s triangle worksheets | 14–16 years

Think about sodium hydroxide (NaOH) solution at a macroscopic, sub-microscopic and symbolic level

Resource

Crynodiad sodiwm hydrocsid | Taflenni gwaith triongl Johnstone | 14–16 oed

Meddwl am hydoddiant sodiwm hydrocsid (NaOH) ar lefel facrosgopig, is-ficrosgopig a symbolaidd

Resource

Extracting tin from tin oxide | Johnstone’s triangle worksheets | 14–16 years

Introduce calculations using reacting masses in the context of extracting tin from tin oxide