Matter

What is an element?

• a material made up of two or more different substances which are physically combined.

• substance formed when two or more chemical elements are chemically bonded together

• any substance that cannot be decomposed into simpler substances by ordinary chemical processes.

• sample of matter with both definite and constant composition and distinct chemical properties.

When a substance, such as an element or a compound, changes into one or more new substances, it has exhibited a

• chemical property

• extensive property

• chemical change

• physical change

Which of the following would be considered physical properties of a substance? a)density b)reactivity c)boiling point

• a only

• b only

• c only

• a and c

• a,b, and c

The equation for density is

• volume divided by mass

• volume times mass

• Mass divided by volume

• mass times volume

A homogeneous mixture is also referred to as a

• Compound

• Element

• Pure substance

• Solution

Which of the following is a pure substance

• Calcium phosphide (Ca3P2)

• salt and sand in water

• Density of syrup

• Manganese (Mn) mixed with Oxygen (O) atoms

Flammability, reactivity, and toxicity are examples of a

• chemical change

• chemical property

• physical property

• physical change

Which of the following is incorrectly paired

• magnesium: element

• fruit salad: homogeneous mixture

• pizza: heterogeneous mixture

• H2O: compound

What is a extensive property?

• can be observed or measured without changing the composition of matter

• a property or characteristic of a substance that is observed during a reaction in which the chemical composition or identity of the substance is changed

• a property of matter that depends only on the type of matter in a sample and not on the amount.

• property is a property that depends on the amount of matter in a sample.

Which substance is a pure substance?

• A

• B

• both A & B

• neither A or B