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