What is the best method to classify a chemical substance.

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Testing State of Matter: Is substance a solid

NO

It is a covalent substance, this is because both ionic and metallic substances have high MP and BP, meaning they cannot melt or vaporise at room temperature.

YES

It can be a covalent, ionic or mettalic substance because all of these substances can be solid at room temperature.

Testing Lustre: Is substance lustrous

YES

NO

Substance would most likely be covalent or ionic

Substance would most likely be metallic.

Testing Hardness and Malleability: What happens if force is applied to substance

Nothing happens

It breaks

It bends

Substance is most likely metallic because many metallic substances are malleable

Substance is most likely ionic or mettalic because many ionic and metallic substances are hard

Substance is most likely covalent or ionic because covalent and ionic substances are brittle.

It breaks easily

Substance is most likely covalent because covalent substances are soft

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Testing Electrical conductivity: Is substance electrically conductive

No

Substance is most likely ionic or covalent because ionic or covalent substances do not conduct electricity when in solid form

Yes

Substance is most likey mettalic because mettalic substances conduct electricity

Testing MP: does substance melt over bunsen burner (if substance is liquid then skip this step)

Testing solubility and reactivity with water: Can substance be dissolved in water

No

Substance can be either mettalic, covalent or ionic

Yes without reacting

Substance cannot be mettalic. This is because metallic substance cannot dissolve in water without reacting

Testing Electrical conductivity as an aquareous solution: Is substance electrically conductive

No

Substance is most likey covalent. This is because covalent substances aren't electrically conductive when they are aquareous

Yes

Substance is most likely ionic. This is because ionic substances are electrically conductive when they are aquareous

Substances that have more mettalic traits are mettalic. Substances that have more ionic traits are ionic.
Substances that have more covalent traits are covalent.

It reacts

Substance is metallic. Some metallic substances react with water.

No

Yes

Substance is probably covalent because covalent substances have low MP

Substance can be either covalent, ionic, or mettalic. This is because covalent, ionic and mettalic substances can have a higher MP than the heat from the Bunsen burner