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What is the best method to classify a chemical substance? - Coggle Diagram
What is the best method to classify a chemical substance?
Limitations
Limitation 1: Don't know what the five elements are (Dont know the names)
Risk Assessment
Bunsen Burner: Burns to skin, hair, create noxious chemical fumes, can serve as an ignition source for other flammable materials, and can heat non-flammable surfaces to high temperatures.
Hammer: Damage fingers and other body parts, damage to surfaces, cause damage to other people.
Background Information
A chemical bond is a lasting attraction between atoms or ions that enables the formation of molecules, crystals, and other structures.
How to find what bond a substance has: There is a couple different ways to determine if a bond is ionic or covalent. By definition, an ionic bond is between a metal and a nonmetal, and a covalent bond is between 2 nonmetals. So you usually just look at the periodic table and determine whether your compound is made of a metal/nonmetal or is just 2 nonmetals.
Variables
Uncontrolled Variable: Cannot control what substances each individual gets.
Dependent Variable: The five unknown Substances
Potential Risks
Burns
Fire
Poisoning
Explosion
Corrosion
Skin irritants
Eye irritants
Testing Methods
Ionic Bonds: One way would be to dissolve them in water. Ionic compounds will break into ions and allow the solution to conduct an electric current, whereas covalently bonded substances will not. Another way would be to find the substance's melting point.
Metallic Bonds: During a flame test, chemists take an unknown metal and put it under a flame. The flame will turn different colors based on which metal is in the substance.
Covalent Bonds: dissolve a compound into water than place an electrical source in it if it reacts to the electricity than it is ionic if nothing happens than it is covalent.
Conductivity
Melting point/Boiling point
solubility
odour
Ductility
lustre
appearance
temperature
colour
formation of bubbles
formation of a gas, liquid or a solid
Different Bonds
Covalent Bonding: the interatomic linkage that results from the sharing of an electron pair between two atoms.
Ionic Bonding: type of linkage formed from the electrostatic attraction between oppositely charged ions in a chemical compound
Metallic Bonding: a type of chemical bonding that arises from the electrostatic attractive force between conduction electrons and positively charged metal ions.