Elements, compound, and mixtures

How many different atoms

are there in a compound?

• 0

• 1

• 2 or more

• -1

Tags

NGSS.MS-PS1-1

Which of the following does not describe elements?

• All particles are alike

• Can be broken down into simpler substances

• Have unique sets of properties

• Join together to form compounds

Which of the following best describes chicken noodle soup

• element

• compound

• mixture

• solution

What is the chemical formula for water?

• NaCl

• CO₂

• NH₃

• H₂O

Tags

NGSS.MS-PS1-1

Example of a homogeneous mixture

• sweet tea

• pizza

• guacamole

• helium

What is a mixture?

• an atom

• 2 or more substances that are together in the same place, but their atoms are not chemically bonded

• a substance that cannot be broken down into any other substances by physical or chemical means

• A substance made of 2 or more elements that are chemically

  combined in a set ratio

The smallest unit of an element that has all the basic properties of the element is called what?

• compound

• mixture

• element

• atom

Which of the following substances can be separated into simpler substances only by chemical means: sodium, salt water, water, gold

• sodium

• salt water

• water

• gold

Tags

NGSS.MS-PS1-2

What is the atomic number?

• 8

• 15.999

• 16

• ?

Tags

NGSS.MS-PS1-1

How would you separate sand and water?

• boil

• filter

• magnetic

• put it in the fridge