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Class notes Natural Sciences
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- Natural Sciences
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- 9th Grade
Grade 9 natural sciences notes Chapter: Elements and compounds
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Natural SciencesGrade 9
By
Nhlanha Hlongwane
, Elements and Compounds
Compounds
Note: The following must be understood by the learners.
. What is a compound?
. How is a compound different from an element?
. How is a mixture of elements different from a compound?
. What does the position of an element on the periodic table talks about its properties?
. Where do we find metals, non-metals, and semi-metals on the periodic table?
. What are the vertical columns of the periodic table called?
. What are the horizontal rows of the periodic table called?
. What do elements belonging to the same group of the periodic table have in common?
. What additional information about an element can we find on the periodic table?
. What does the formula of a compound tell us about it?
Note this:
. Compound
. Crystal lattice
. Element
. Diatomic
. Molecule
In your grade 8 you learned about Matter and Materials. We will do some catchup on the
main ideas about elements and compound from grade 8. This will help to add on what we
already know in new ideas in this chapter.
The Particles That Make Up Compounds.
The particles of compounds consist of two or more atoms. In some cases, they can form
molecules. Molecule is the word scientists use for a cluster of atoms that stick together in
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