GRADE 8 Rationalized INTEGRATED SCIENCE NOTES
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Word Editable SampleGRADE 8 RATIONALIZED INTEGRATED SCIENCE
LESSON NOTES COMPLETE
STRAND 1- MIXTURES, ELEMENTS AND COMPOUNDS.
ELEMENTS AND COMPUNDS
Meaning of Atoms, Elements, molecules and Compounds.
Matter is anything that occupies space and has mass.
Matter is composed of pure substances and mixtures.
The pure substances are can be element and compounds while the mixtures can either be uniform or non-uniform.
An element is a substance that cannot be decomposed into simpler substances by chemical or physical means.
An element is a pure substance which cannot be made simpler using chemical means.
Elements are the building blocks of matter. Everything around is made up of an element or elements.
An element is made of atoms.
Atoms of the same element are identical.
A compound is pure substance that consists of atoms of two or more elements that are chemically joined together.
Compounds are formed when atoms of different elements react.
Compounds can be broken down into elements through chemical reactions.
| | The symbols of some elements derived from English names are as follows: | |||||
|---|---|---|---|---|---|---|
| Name of element | Chemical symbol | Name of element | Chemical symbol | |||
| 1 | Hydrogen | H | Nitrogen | N | ||
| 2 | Helium | He | 8 | Oxygen | O | |
| 3 | Lithium | Li | 9 | Fluorine | F |
This document is professionally prepared and verified for Grade 8 (Junior Secondary) • All Terms.
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