Nature of Matter

Atoms are

• Only made of protons

• The smallest unit of matter

• Only made of electrons

• Made of 5 subatomic particles

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An element

• is a type of vehicle made by Toyota.

• consists of 2 types of atoms bonded together.

• consists of more than one type of atom.

• is a pure substance that consists entirely of one type of atom.

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In the periodic table of elements, the periods are shown

• horizontally

• vertically

• diagonally

• upside down

In the periodic table of elements, the groups are shown

• horizontally

• vertically

• diagonally

• upside down

A chemical compound is

• a substance formed by the chemical combination of two or more elements

• a substance formed by the chemical bonding of one element

• oxygen gas, O₂

• usually has identical physical and chemical properties to those elements from which it is formed.

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Some molecules are compounds, but not ALL molecules are compounds.

• True

• False

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H₂O

• is a compound but not a molecule

• is only a molecule and not a compound

• is a compound and is also referred to as a molecule

• is neither a compound or molecule

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O₂ Gas

• is a compound

• is not a molecule

• is a solid

• is an example of a molecule, but not a compound

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An ionic bond forms

• when one or more electrons are transferred from one atom to another.

• when electrons are shared between atoms.

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A covalent bond forms

• when one or more electrons are transferred from one atom to another.

• when electrons are shared between atoms.

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