8.6A & 6.6C Quiz

What is a characteristic of mixtures?

• Composed of two or more different elements chemically combined

• Substances that are able to be broken down chemically

• Can be homogeneous or heterogeneous

• Represented by a chemical formula

Which of the following is true about mixtures?

• They are pure substances

• They are represented by a chemical formula

• They do not undergo chemical changes when combined

• They are found on the Periodic Table of Elements

Which of the following is NOT an example of a pure substance?

• Sulfur crystal

• Oxygen gas

• Steel

• Mercury at room temp

Which of the following is an example of a gas element?

• Air

• Oxygen gas

• Carbon dioxide

• Saltwater

What is the term for a pure substance that cannot be broken down chemically?

• Element

• Compound

• Mixture

• Homogeneous Mixture

Which of the following is a property of metalloids?

• Always shiny

• Always dull

• Semiconductors

• Always brittle

Which of the following best describes nonmetals?

• Elements that have properties of both metals and nonmetals

• Elements that are mostly dull, brittle, not malleable or ductile, and poor conductors of heat and electricity

• Group of metals located at the bottom of the Periodic Table of Elements

• The simplest unit of a chemical compound

What is a molecule?

• The smallest particle of an element

• A pure substance composed of the same type of atom throughout

• The simplest unit of a chemical compound that can exist, formed when two or more atoms join together chemically

• A one- or two-letter notation used to represent an atom

Tags

NGSS.MS-PS1-1

Which of the following is an example of a heterogeneous mixture?

• Water and salt

• Water and sand

• Salt and sugar

• Air

Which property describes the ability of a substance to transfer heat or electrical energy?

• Luster

• Malleability

• Conductivity

• Density

Tags

NGSS.MS-PS3-3

NGSS.MS-PS3-4