Saturday, 4 February 2012

Pictures for Modeling Atoms, Elements, Compounds in the Solid, Liquid and Gaseous State


1) A single atom from a single element is only of 1 type of atom, and hence it should be of 1 colour of M&M in this case. It is the simplest and the most basic of all. 

2) A gaseous element will have its atoms far apart from each other, and there will also be only 1 colour of M&M because there is only one type of atom/element in this case.

3) A liquid element will have its atoms more closer together than those of the solid elements, but they will still be moving from one point to another. They will also be made up of only 1 colour of M&M, because there is only 1 type of atom/element involved in this case.

4) A solid element will have its atoms closely packed together, and they will be vibrating about a fixed position. They will also be made up of only 1 colour of M&M, because there is only 1 type of atom/element involved in this case.

Evaluation: The differences between the atoms of solid, liquid and gaseous elements are only in their arrangements and movement. One of their similarities is that there will only be 1 type of atom/element for each of them.
5) A gaseous compound's atoms will be far apart from each other since they are in gaseous states. There must also be more than 1 colour of the M&M because more than 1 type of atoms is being involved in this case. The different types of atoms must also be in fixed ratios as they are compounds.

6) A liquid compound's atoms will be of the same as those of the gaseous compound's, except that the atoms of the liquid compounds will not be so far apart from each other as those of the gaseous compound's ones.

7) A solid compound's atoms will be of the same as those of the gaseous compound's and liquid compound's ones, except that their atoms will be more closely packed together, and not be so far apart from each other as those of the gaseous and liquid compound's ones.

Evaluation: The differences between the atoms of the gaseous, liquid and solid compounds are also in their arrangements, as well as their movement. One of their similarities is that although they are different, they must be in fixed ratios.

8) The atoms in a mixture of 2 gaseous elements will be very far apart from each other, because they are in the gaseous states. They are not chemically bonded together, and hence the 2 different types of atoms will not be in a fixed ratio. 

9) The sets of atoms in a mixture of 2 gaseous compounds will also be very far apart from each other, because they are in the gaseous states. These sets represent the compounds. The sets will also be of different shapes and sizes, thus representing the mixtures. There will also be 2 different types of atoms, represented by the 2 colours of the M&Ms. 

10) The sets of atoms in a mixture of 1 gaseous element and 1 gaseous compound will also be far apart from each other and will look like those of the mixture of 2 gaseous elements and compounds, except that this time it is only between 1 type of compound and 1 type of element.

Point to note: If we want to know the arrangement and movement of the atoms in these mixtures, we have to know the properties of elements, compounds and mixtures well first. In feature/picture 9, there are 2 different types of gaseous compounds (compound) that are not chemically bonded together (mixture). In feature/picture 10, there is a gaseous element (element) and a gaseous compound (compound) that are not chemically bonded together (mixture).

I am not quite sure about whether the pictures for (8), (9) and (10) are correct. If any of your have any comments for me, please kindly put them down.


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