Molecules & Compounds

What is a molecule?

• two or more atoms bonded together.

• two or more atoms - of at least two different elements - bonded together

Tags

NGSS.MS-PS1-1

What does the subscript 3 in this chemical formula mean?

• There are three separate oxygen atoms

• There are three oxygen molecules

• There are three oxygen atoms that are bonded together

What does the 4 in this chemical formula mean?

• There are four hydrogen atoms in the molecule

• There are four water molecules

• There are four Hydrogen and four oxygen atoms in the molecule

Tags

NGSS.MS-PS1-1

Is water a molecule, a compound, or both?

• Molecule

• Compound

• Both

Tags

NGSS.MS-PS1-1

If molecules are like Legos, then....

• each individual Lego represents an atom and what you build from the Legos represent molecules.

• each individual Lego represents molecules.

• each individual atom represents compounds.

Tags

NGSS.MS-PS1-1

The 2 in this equation is a _______________.

• coefficient

• subscript

The 4 in this equation is a _______________.

• coefficient

• subscript

This picture is a citric acid molecule. It's what makes sour candies sour! Which of the following is the correct chemical formula for this molecule?

• C₆H₁₂O₆

• CH₄

• C₆H₈O₇

Tags

NGSS.MS-PS1-1

Is citric acid (in the picture above) a molecule, a compound, or both?

• Molecule

• Compound

• Both

Tags

NGSS.MS-PS1-1

A specific type of atom (like iron, oxygen, or gold) by itself is called an....

• element

• molecule

• compound