chemistry

You can't live without water! What is its chemical formula?

• H₂

• O₂

• H₂O

• H₂O₂

Tags

NGSS.MS-PS1-1

This picture represents which of the following?

• A single element

• Mixture of molecules

• mixture of atoms

• mixture of compounds

Tags

NGSS.MS-PS1-1

The center of an atom is called the

• proton

• electron

• neutron

• nucleus

protons are

• located in the nucleus and have a positive charge

• located in the nucleus and have a negative charge

• the most important part of an atom

• atoms

Identify the heterogeneous mixture

• sweet tea

• salad

• jello

• gold

1 A substance made up of two or more chemically combined elements is —

• an element

• mixture

• compound

• solution

NaHCO₃ is an example of —

• an abbreviation
• a compound
• a mixture
• an element

Tags

NGSS.MS-PS1-1

Classify the picture with the correct label.

• Element
• Compound
• Mixture of Elements
• Mixture of Compounds

Tags

NGSS.MS-PS1-1

What does this illustrate

• Elements

• Compunds

• Mixture of Elements and Compunds

• Mixture of Compounds

Tags

NGSS.MS-PS1-1

Identify the homogeneous mixture

• milk

• trail mix

• calcium

• sugar