Classification of Matter - Elements and Compounds

What is matter primarily made of?

• Energy

• Light

• Heat

• Atoms and molecules

Tags

NGSS.MS-PS1-1

What are the two categories of matter discussed?

• Elements and compounds

• Pure substances and mixtures

• Atoms and elements

• Molecules and compounds

What is an element?

• A compound of atoms

• A type of molecule

• A mixture of different atoms

• A pure substance consisting of one type of atom

What defines a compound?

• A pure substance made of two or more types of atoms chemically bonded

• A mixture of elements

• A homogeneous mixture

• A single type of atom

Tags

NGSS.MS-PS1-1

What is a homogeneous mixture?

• A pure substance with unique physical properties

• A mixture where components are not evenly distributed

• An element from the periodic table

• A mixture where components are evenly distributed

What is a heterogeneous mixture?

• An element with different types of atoms

• A mixture with visibly different phases or parts

• A pure compound

• A mixture with a single visible phase

What physical properties do pure substances have?

• No unique physical properties

• Variable density based on composition

• Unique boiling points, melting points, and density

• Random boiling and melting points

Can mixtures be physically separated?

• Yes, but only if they are compounds

• No, they are homogeneous

• Yes, through filtration or other physical methods

• No, they require chemical reactions

What is the main characteristic of elements?

• They can be found on the periodic table as a single type of atom

• They are compounds with chemical bonds

• They consist of multiple types of atoms

• They are always mixtures

What distinguishes a compound from a mixture?

• Mixtures consist of one type of molecule

• Compounds consist of chemically bonded atoms of different types

• Mixtures have unique physical properties

• Compounds can be physically separated