Task 4 Review Reactions
Click on each title to watch videos
Sodium in water
Magnesium in air
Iron in water and air - refer to Week 3
Sodium in chlorine gas
Through class exercises you have built the concept that that when a metal is reacted with a non-metal a compound is formed. This is because metal atoms tend to have their outer electrons ripped off by non-metal atoms. When this happens IONS are formed.
Metals atoms form positive ions and non-metal atoms form negative ions. The number of electrons transferred give the magnitude of the charge on the ion.
Positive and negative ions have a strong electrostatic force between them.
If you missed this class or want to review the concept visit the video below
http://www.youtube.com/watch?v=gsvR4AZGRSk&feature=related
Sodium in water
Magnesium in air
Iron in water and air - refer to Week 3
Sodium in chlorine gas
Through class exercises you have built the concept that that when a metal is reacted with a non-metal a compound is formed. This is because metal atoms tend to have their outer electrons ripped off by non-metal atoms. When this happens IONS are formed.
Metals atoms form positive ions and non-metal atoms form negative ions. The number of electrons transferred give the magnitude of the charge on the ion.
Positive and negative ions have a strong electrostatic force between them.
If you missed this class or want to review the concept visit the video below
http://www.youtube.com/watch?v=gsvR4AZGRSk&feature=related
Week 6 Investigating Test on Reaction Rates, and
Task 1 Analyse the results of the Investigation
- Plot a graph of the class averages for both investigations.
- For each graph comment on the relationship between the variables.
- Evaluate Reliability and Accuracy of the Investigation.
Task 2 Finish Writing Formulae of Ionic Compounds
- Watch Video: Junior Chemistry: Compounds 1 and Junior Chemistry: Compounds 2
- Read over Little Yellow Book "Compounds of a metal with a non-metal" pages 21 to 22
- In class - Complete pages 22 Exercises 22, 23, 24, 25, 26
- At home - Complete handout Writing Formulae Sets 1, 2, 3 and 4
Ionic Models |
Covalent Models |
Task 5 Investigating Test on Reaction Rates
This is a Year 9 ASSESSMENT TASK. You will sit this test on your last Science Lesson of this week.There will be NO Formative Test this week.