ATOMIC STRUCTURE AND ENTHALPY CHANGE
Title:
Demonstrate understanding of bonding, structure, properties and energy changes
Level: 2
Credits: 5
Assessment: External
Date version published: 17 November 2011
This achievement standard involves demonstrating understanding of bonding, structure, properties and energy changes.
Achievement Criteria
Achievement
· Demonstrate understanding of bonding, structure, properties and energy changes.
Achievement with Merit
· Demonstrate in-depth understanding of bonding, structure, properties and energy changes.
Achievement with Excellence
· Demonstrate comprehensive understanding of bonding, structure, properties and energy changes.
Explanatory Notes
1 This achievement standard is derived from The New Zealand Curriculum, Learning Media, Ministry of Education, 2007, Level 7. The standard is aligned to the Nature of Science achievement objectives and the Material World achievement objectives, and is related to the material in the Teaching and Learning Guide for Chemistry, Ministry of Education, 2010 at http://seniorsecondary.tki.org.nz.
2 Procedures outlined in Safety and Science: a Guidance Manual for New Zealand Schools, Learning Media, Ministry of Education, 2000 should be followed.
3 Demonstrate understanding involves describing, identifying, naming, drawing, calculating, or giving an account of bonding, structure and properties of different substances and the energy involved in physical and chemical changes. This requires the use of chemistry vocabulary, symbols and conventions.
Demonstrate in-depth understanding involves making and explaining links between the bonding, structure and properties of different substances and the energy involved in physical and chemical changes. This requires explanations that use chemistry vocabulary, symbols and conventions.
Demonstrate comprehensive understanding involves elaborating, justifying, relating, evaluating, comparing and contrasting, or analysing links between bonding, structure and properties of different substances and the energy involved in physical and chemical changes. This requires the consistent use of chemistry vocabulary, symbols and conventions.
4 Bonding, structure and energy changes are limited to:
· ionic, covalent and metallic bonding
· intermolecular forces (the distinction between the different types of intermolecular forces is not required)
· Lewis structures, shape and polarity of simple molecules. Simple molecules have no more than four electron pairs about any atom (including multiple-bonded species)
· molecular, ionic, metallic and covalent network substances
· exothermic and endothermic reactions including energy (enthalpy) changes associated with differing amounts of substances and changes of state and enthalpy changes associated with the making and breaking of chemical bonds
· calculations of energy changes using ΔrH and reaction stoichiometry, and bond enthalpy.
5 Properties are limited to hardness, malleability, ductility, electrical conductivity, melting and boiling points and solubility.
6 Assessment Specifications for this achievement standard can be accessed through the Chemistry Resources page found at http://www.nzqa.govt.nz/qualifications-standards/qualifications/ncea/ncea-subject-resources/.
Demonstrate understanding of bonding, structure, properties and energy changes
Level: 2
Credits: 5
Assessment: External
Date version published: 17 November 2011
This achievement standard involves demonstrating understanding of bonding, structure, properties and energy changes.
Achievement Criteria
Achievement
· Demonstrate understanding of bonding, structure, properties and energy changes.
Achievement with Merit
· Demonstrate in-depth understanding of bonding, structure, properties and energy changes.
Achievement with Excellence
· Demonstrate comprehensive understanding of bonding, structure, properties and energy changes.
Explanatory Notes
1 This achievement standard is derived from The New Zealand Curriculum, Learning Media, Ministry of Education, 2007, Level 7. The standard is aligned to the Nature of Science achievement objectives and the Material World achievement objectives, and is related to the material in the Teaching and Learning Guide for Chemistry, Ministry of Education, 2010 at http://seniorsecondary.tki.org.nz.
2 Procedures outlined in Safety and Science: a Guidance Manual for New Zealand Schools, Learning Media, Ministry of Education, 2000 should be followed.
3 Demonstrate understanding involves describing, identifying, naming, drawing, calculating, or giving an account of bonding, structure and properties of different substances and the energy involved in physical and chemical changes. This requires the use of chemistry vocabulary, symbols and conventions.
Demonstrate in-depth understanding involves making and explaining links between the bonding, structure and properties of different substances and the energy involved in physical and chemical changes. This requires explanations that use chemistry vocabulary, symbols and conventions.
Demonstrate comprehensive understanding involves elaborating, justifying, relating, evaluating, comparing and contrasting, or analysing links between bonding, structure and properties of different substances and the energy involved in physical and chemical changes. This requires the consistent use of chemistry vocabulary, symbols and conventions.
4 Bonding, structure and energy changes are limited to:
· ionic, covalent and metallic bonding
· intermolecular forces (the distinction between the different types of intermolecular forces is not required)
· Lewis structures, shape and polarity of simple molecules. Simple molecules have no more than four electron pairs about any atom (including multiple-bonded species)
· molecular, ionic, metallic and covalent network substances
· exothermic and endothermic reactions including energy (enthalpy) changes associated with differing amounts of substances and changes of state and enthalpy changes associated with the making and breaking of chemical bonds
· calculations of energy changes using ΔrH and reaction stoichiometry, and bond enthalpy.
5 Properties are limited to hardness, malleability, ductility, electrical conductivity, melting and boiling points and solubility.
6 Assessment Specifications for this achievement standard can be accessed through the Chemistry Resources page found at http://www.nzqa.govt.nz/qualifications-standards/qualifications/ncea/ncea-subject-resources/.
