Composition of Molecules Review

Which of these are pure substances?

• Diagram I only

• Diagram III only

• Diagrams II and IV

• Diagrams I and III

Tags

NGSS.MS-PS1-1

Diagram I represents:

• an element

• a compound

• a mixture

Tags

NGSS.MS-PS1-1

Diagram III represents:

• an element

• a compound

• a mixture

Tags

NGSS.MS-PS1-1

The particles in Diagram II are:

• atoms only

• molecules only

• atoms and molecules

Tags

NGSS.MS-PS1-1

The particles in Diagram III are:

• atoms only

• molecules only

• atoms and molecules

Tags

NGSS.MS-PS1-1

The particles in Diagram I are:

• atoms only

• molecules only

• atoms and molecules

Tags

NGSS.MS-PS1-1

The three particles shown here are examples of:

• atoms of an element

• atoms of a compound

• molecules of an element

• molecules of a compound

Tags

NGSS.MS-PS1-1

The ten particles shown here are examples of:

• atoms of an element

• atoms of a compound

• molecules of an element

• molecules of a compound

Tags

NGSS.MS-PS1-1

Look at your periodic table.

What is the chemical symbol of the element with the atomic number 11?

Look at your periodic table.

What is the chemical symbol of the element with the atomic number 35?