Chemistry Unit Test Review

What is a Physical Property?

• A characteristic of a substance is observed or measured without changing the actual structure and composition of the substance.

• A change in the chemical structure of a substance.

• A property that involves a substance reacting with another substance.

• A measure of how much matter is in an object.

Define Element.

• A pure substance that can’t be broken down by physical or chemical means.

• A mixture of two or more substances.

• A compound that can be separated into simpler substances.

• A solution that can be filtered.

What is an Element Symbol?

• A one-or-two letter symbol that represents a chemical element.

• A number that represents the atomic mass of an element.

• A three-letter abbreviation for a compound.

• A symbol used in mathematical equations.

What is a Qualitative Property?

• Observing a substance with our senses including sight, smell, lustre, malleability, etc.

• A property that can be measured with instruments.

• A property that involves numerical data.

• A property that is related to the chemical composition of a substance.

Define Quantitative Property.

• Observing a substance using numerical values and measurements.

• Observing a substance using qualitative descriptions.

• Observing a substance using sensory perceptions.

• Observing a substance using subjective opinions.

What is a Physical Change?

• A change where the composition of the substance does NOT change.

• A change that results in the formation of a new substance.

• A change that involves a chemical reaction.

• A change that cannot be reversed.

Define Chemical Property.

• A characteristic of a substance that is determined when the composition of the substance changes or a new substance is produced.

• A characteristic of a substance that can be observed without changing its composition.

• A measure of the amount of matter in an object.

• A property that describes the state of matter.

What is a Chemical Change?

• A change in the starting substance and/or the creation of a new substance.

• A change in the state of matter without altering the chemical composition.

• A temporary change that can be easily reversed.

• A change that only affects the physical appearance.

What is an Alloy?

• A solid solution of two or more metals.

• A single pure metal.

• A mixture of metal and non-metal in liquid form.

• A compound formed by chemical reaction of metals.

Define Metal.

• An element that is malleable, ductile, lustrous, and conducts electricity, and heat and most react with acid.

• A non-metallic element that is brittle and does not conduct electricity.

• A gaseous element that is colorless and odorless.

• A liquid element that is highly volatile and non-conductive.