CH 4 Compounds and Mixture

Term

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Element

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Terms in this set (18)

substance that cannot be chemically broken down into simpler substances

Image: Element

substances made up of two or more elements that are chemically combined. The new substance that is formed can be separated . Examples are sugar, chalk , rust etc.

Image: Compound

two or more substances that have been physically combined. Examples are salad, trail mix etc.

It is smallest part of a substance that has the same properties as that substance . A molecule can made up of a single atom or many different atoms joined together. Example, a single molecule of iron or a molecule of sucrose made up of 45 atoms

Image: Molecule

Valence Electron

An electron in the outermost energy level of an atom.

Image: Valence Electron

When the number of electrons in an atom is different from the protons , the atom becomes electrically charged. A charged atom is called an ion.

Bond formed between atoms that have gained or lost electrons

Image: Ionic Bond

Compounds whose atoms are held together by ionic bonds

Image: Ionic Compound

Bonds formed when atoms share electrons

Image: Covalent Bond

Covalent Compounds

Compounds formed by sharing of electrons ( covalent bonding)

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