How do the properties of metals differ from those of both ionic and molecular compounds?

Answer and Explanation:

Metals are lustrous (shiny), malleable (that means that can be hammered) and ductile. They are usually solid at room temperature (except mercury which is liquid). They are good conductors of heat and electricity. They are made of metallic bonds. Examples:   iron (Fe), silver (Ag).

Ionic compounds are hard and usually brittle. They form crystals (solid at room temperature) and they have high melting points. They only conduct electricity when are dissolved in water. They are made of ionic bonds Examples: sodium chloride (NaCl), magnesium oxide (MgO).

Molecular compounds are gases, liquids or low-melting solids. They are poor conductors of heat and electricity. They have low melting and boiling points. They are made of covalent bonds. For example: methane (CH₄) and ozone (O₃).

answer : one can design an experiment using a liquid and an additive that can be added to the liquid and observe the chemical changes in the reaction species.

one would need a beaker which is filled with a known amount of the liquid in which thermometer is placed to measure the temperature changes; after addition of the additive to the liquid solution one can note down the temperature change and find whether the reaction is endothermic or exothermic in nature. by subtracting the initial temperature value with the final temperature one can find the temperature changes.

various combinations of liquid and additive can be used. liquid in this case can be a known quantity of water and additives can be epsom salt or without epsom salt the experiment can be conducted to notice the changes. water and ice, hydrogen peroxide and dry yeast, vinegar and baking soda,etc.