Compounds vs Molecules

Which of the following atomic symbols is written correctly?

• ee
• hE
• C
• CL

Which of the following chemical formulas represents a compound? 

• C₃
• O₂
• CH₃CHO
• H₂

Tags

NGSS.MS-PS1-1

Which statement best describes an element?

• made from mixture 
• thousands in the world
• pure, made of only one atom
• can be separated 

Carbon is considered an element while carbon dioxide is considered a compound. This is because carbon dioxide is –

• a gas at room temperature.
• made of two different elements.
• given off by green plants.

Tags

NGSS.MS-PS1-1

This picture represents which of the following?

• element
• compound
• mixture

Tags

NGSS.MS-PS1-1

This picture represents which of the following?

• element
• compound
• mixture

Tags

NGSS.MS-PS1-1

What is the tiniest particle in the entire universe?

• cells
• gases
• atoms
• liquids

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-5

What is the name of a single type of atom?

• cell
• proton
• element
• atom

What is the term for combining 2 or more atoms together?

• atoms
• elements
• molecules
• compounds

Tags

NGSS.MS-PS1-1

What is the term for combining 2 or more DIFFERENT atoms together?

• atoms
• elements
• molecules
• compounds

Tags

NGSS.MS-PS1-5