Front

What is an element?

Back

An element is a pure substance that cannot be broken down into simpler substances by chemical means. It consists of only one type of atom.

Front

What is a compound?

Back

A compound is a substance formed when two or more different elements are chemically bonded together in a fixed ratio.

Tags

NGSS.MS-PS1-1

Front

What is a mixture?

Back

A mixture is a combination of two or more substances that are not chemically bonded and can be separated by physical means.

Front

How can you identify a mixture in a diagram?

Back

A mixture is represented by overlapping circles of different colors, indicating the presence of different elements or compounds.

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What does the term 'pure substance' mean?

Back

A pure substance is a material that has a constant composition and consistent properties throughout.

Tags

NGSS.MS-PS1-4

Front

What is the difference between a homogeneous mixture and a heterogeneous mixture?

Back

A homogeneous mixture has a uniform composition throughout, while a heterogeneous mixture has visibly different substances or phases.

Front

Give an example of a compound.

Back

Sodium Chloride (NaCl) is an example of a compound, formed from sodium and chlorine.

Front

What is the significance of chemical formulas in compounds?

Back

Chemical formulas represent the elements in a compound and the ratio of atoms of each element.

Tags

NGSS.MS-PS1-1

Front

What is the role of atoms in elements and compounds?

Back

Atoms are the basic building blocks of matter; elements consist of one type of atom, while compounds consist of two or more different types of atoms.

Tags

NGSS.MS-PS1-1

Front

What does it mean for a substance to be a 'mixture of elements'?

Back

A mixture of elements contains two or more different elements that are not chemically combined, allowing each element to retain its properties.