Chemistry

Strand three: Chemical world

ELEMENT: Building blocks

Students should be able to:

Physical and Chemical Changes

1. investigate whether mass is unchanged when chemical and physical changes take place

Follow on to the Physical and Chemical Changes page

2. develop and use models to describe the atomic nature of matter; demonstrate how they provide a simple way to account for the conservation of mass, changes of state, physical change, chemical change, mixtures, and their separation

Explain what a mixture is. Give 3 examples ☐

1. Explain filtration. Draw a diagram of a filtration experiment. Name a mixture that can be separated by filtration. ☐

Go to the Filtration page

2. Explain evaporation. Draw a diagram of an evaporation experiment. Name a mixture that can be separated by evaporation. ☐

Go to the Evaporation page

3. Explain condensation. ☐

4. Explain distillation. Draw a diagram of a distillation experiment. Name a mixture that can be separated by distillation. ☐

Go to the Distillation page

5. Explain chromatography. Draw a diagram of chromatography experiment. Name a mixture that can be separated by chromatography. ☐

Go to the Chromatography page

6. Describe any other method to separate mixtures

   1. Magnetic Separations

   2. Panning

Use my ‘particle spectacles’ to describe how particles act during these separation techniques.

3. describe and model the structure of the atom in terms of the nucleus, protons, neutrons and electrons; comparing mass and charge of protons neutrons and electrons

1. Compare the charges on electrons, neutrons & protons ☐

2. Compare the mass of electrons, neutrons & protons ☐

3. State where electrons, neutrons & protons are found ☐

4. Be able to define ‘atomic number’ and ‘mass number’ and find the atomic number and mass numbers of elements using the periodic

table ☐

5. Be able to draw the Bohr model of an atom ☐

6. Be able to describe a model of the atom that you made ☐

4. classify substances as elements, compounds, mixtures, metals, non-metals, solids, liquids, gases and solutions.

1. Define element, compound and mixture ☐

2. Be able to classify a substance as an element/ compound/

mixture ☐

3. List the properties of a metal and a non-metal ☐

4. Be able to give examples of a metal and non-metal ☐

5. Be able to describe the three states of matter – solids, liquids and gases – their particles, and their properties (see LO2) ☐

6. Be able to define soluble, insoluble, solute, solvent and solution ☐

ELEMENT: Systems and interactions

Students should be able to:

5. use the Periodic Table to predict the ratio of atoms in compounds of two elements

1. State the Octet Rule ☐

2. Figure out how many electrons an atom wants to gain or lose to be stable ☐

Be able to predict the ratio of atoms in compounds of two elements and write their chemical formula ☐

6. investigate the properties of different materials including solubilities, conductivity, melting points and boiling points

7. investigate the effect of a number of variables on the rate of chemical reactions including the production of common gases and biochemical reactions

8. investigate reactions between acids and bases; use indicators and the pH scale.

ELEMENT: Energy

Students should be able to:

9. consider chemical reactions in terms of energy, using the terms exothermic, endothermic and activation energy, and use simple energy profile diagrams to illustrate energy changes.

ELEMENT: Sustainability

Students should be able to:

10. evaluate how humans contribute to sustainability through the extraction, use, disposal, and recycling of materials.

separate mixtures using filtration

Apparatus ......