Understanding chemical symbols 0 Overview Using this Resource Connecting to the Curriculum Marking Student Responses Working with Students Further Resources This task is about molecules, elements and atoms. Question 1Change answer Use the information in the Periodic Table and your own knowledge to complete the table below. The first row has been done for you. Use the information in the Periodic Table and your own knowledge to complete the table below. The first row has been done for you. Formula Types of atoms Total number of atoms CO2 Carbon, oxygen 3 i) H2S ii) MgCl2 iii) Al(CN)3 Task administration: This task can be completed with pencil and paper or online with some auto-marking. Level: 5 Curriculum info: Science, Communicating in science, Material World Keywords: structure of matter, elements, atoms, symbols Description of task: Students use the periodic table and their own knowledge to complete the types of atoms present, and total number of atoms present for three compounds. Curriculum Links: Science capabilities The capabilities focus is brought about by the conversations you have and the questions you ask. Capability: Interpret representations This resource provides opportunities to discuss how scientists use symbols to show relationships and combinations of elements, compounds and mixtures. Science capability: Interpret representations (TKI) Science capabilities: Interpret representations Answers/responses: Y10 (05/1999) i) Hydrogen, sulfur, 3 easy ii) Magnesium, chlorine, 3 easy iii) Aluminium, carbon, nitrogen, 7 very difficult Diagnostic and formative information: Analysis of Responses iii) 65% of students were able to write down correctly the names of the three elements, while 28% wrote down just Aluminium. For the number of atoms, 21% gave 3, 19% gave 4, 19% gave 7, 10% gave no number, and 7% gave 5 for the number of atoms. Something wrong Match to the definition Elements, molecules and compounds Chlorophyll Atoms and elements Elements, compounds, atoms and molecules
