1.1.1 classify materials into elements, compounds and mixtures.
Meaning of elements, compounds and mixtures
- prepare a list of elements, compounds and mixtures.
- give the definition of an element with examples.
- give the definition of an element with examples.
1.1.2 write the chemical symbols for the first twenty elements of the periodic table correctly.
Chemical substances are represented by symbols such as the following:
Sodium – Na
Calcium – Ca
Potassium – K
Calcium – Ca
Potassium – K
1.1.3 draw and label the structure of an atom.
- use models to explain the structure of an atom.
- draw the structure of an atom and label its parts
- mention the sub-atomic particles
- draw the distribution of electrons in the atoms of the first twenty elements of the periodic table.
- label the shells of the atoms.
NOTE: Detailed electronic structure not required.
- draw the structure of an atom and label its parts
- mention the sub-atomic particles
- draw the distribution of electrons in the atoms of the first twenty elements of the periodic table.
- label the shells of the atoms.
NOTE: Detailed electronic structure not required.
1.1.4 state the electrical charges on the sub-atomic particles.
- show that atoms are electrically neutral.
- demonstrate that atoms gain electrons to become negatively charged and lose electrons to become positively charged
- demonstrate that atoms gain electrons to become negatively charged and lose electrons to become positively charged
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