Structure of Matter

Which of the following is formed when two elements combine chemically?

• atom

• compound

• electron

• mixture

Tags

NGSS.MS-PS1-1

What is the smallest unit of a chemical compound that still has the properties of the compound?

• nucleus

• molecule

• element

• atom

In chemistry, the elements are

• pure chemical substances containing only one type of atom

• pure substances containing two or more different types of atoms

• substances which can be burned in the presence of air

• substances that do not react with other substances

Which of the following do water (H₂O), rust (Fe₂O₃), and salt (NaCl) have in common?

• Water, rust, and salt are atoms

• Water, rust, and salt are mixtures

• Water, rust, and salt are elements

• Water, rust, and salt are compounds

Tags

NGSS.MS-PS1-1

Which of the following describes all pure substances?

• consists of only one type of atom

• has a definite chemical composition

• can't be broken down into simpler substances by physical means

• is normally found as a solid at room temperature

A compound is

• a mixture of two or more substances

• pure substance formed by chemical combination of two or more elements

• made up of molecules consisting of only one type of atom

• formed when one substance is dissolved in another

Which of the following is an example of a container that is filled with a pure substance?

• a tire filled with air

• a jar filled with salt water

• a balloon filled with helium

• a glass filled with chocolate milk

Tags

NGSS.MS-PS1-4

What does this picture represent?

• element

• mixture

• compound

• molecule

Tags

NGSS.MS-PS1-1

What does this picture represent?

• element

• mixture

• compound

• molecule

Tags

NGSS.MS-PS1-1

What does this picture represent?

• element

• mixture

• compound

Tags

NGSS.MS-PS1-1