Atoms and elements 0 Overview Using this Resource Connecting to the Curriculum Marking Student Responses Working with Students Further Resources Question a) An atom is made up of ... ions, protons, and electrons. neutrons, electrons, and molecules. molecules, neutrons, and ions. electrons, neutrons, and protons. Question b) Which of the following substances are all elements? Carbon dioxide, iron, salt. Water, air, oxygen. Iron, sulfur, oxygen. Air, oxygen, nitrogen. Question c) The element carbon has an atomic number of 6. This number refers to ... the number of protons. how reactive the atom is. the number of protons and neutrons. how heavy an atom of carbon is. Task administration: This task can be completed with pencil and paper or online. Level: 5 Curriculum info: Science, Knowledge, Material World Keywords: structure of matter, atoms, elements, atomic number, vocabulary Description of task: Students answer three multiple-choice questions about atoms, elements, and atomic number. Answers/responses: Y10 (07/99) a) D - electrons, neutrons, and protons easy b) C - Iron, sulfur, oxygen easy c) A - the number of protons moderate Diagnostic and formative information: Common error c) 29% of students chose option C (the number of protons and neutrons). Something wrong Match to the definition Elements, molecules and compounds Understanding chemical symbols Chlorophyll Elements, compounds, atoms and molecules
