8.6A :Understanding Elements, Compounds, and Mixtures

What defines an element?

• A substance that can be broken down into simpler substances

• A mixture of two or more types of atoms

• A pure substance that cannot be broken down into simpler substances

• A chemical reaction product

How many protons does sodium have?

• 19

• 11

• 2

• 6

What property is unique to each element?

• The number of protons

• The number of molecules

• The number of electrons

• The number of neutrons

What is a compound?

• A pure substance formed from two or more elements chemically combined

• A homogeneous mixture

• A pure substance of only one type of atom

• A mixture of elements that can be separated physically

Tags

NGSS.MS-PS1-1

What ratio of hydrogen to oxygen makes up water?

• 2:2

• 1:1

• 2:1

• 1:2

What is the ratio of carbon to hydrogen to oxygen in glucose?

• 6:12:6

• 1:2:1

• 2:1:2

• 12:6:6

Tags

NGSS.MS-PS1-1

What is a heterogeneous mixture?

• A mixture where you can see the different parts

• A pure substance

• A mixture with a uniform composition

• A chemical compound

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

• Rock

• Salad

• Sand

• Brass

How can mixtures be separated?

• By pressure only

• By changing the temperature only

• By physical means

• By a chemical reaction

Which method is not a way to separate a mixture?

• Photosynthesis

• Filtration

• Distillation

• Magnetism