Counting Atoms

What does the subscript in a chemical formula tell you? (a)  

• How many molecules are present
• How many atoms are present
• How many elements are present
• How many neutrons are present

Tags

NGSS.MS-PS1-1

• 1

• 2

• 3

• 4

Tags

NGSS.MS-PS1-1

• 6

• 1

• 12

Tags

NGSS.MS-PS1-1

What elements are represented in this chemical formula?  $Fe_2O_3$  

• Iron, Oxygen

• Francium, Europium, Oxygen

• Ferrium, Oxygen

• Berylium, Oxygen

Tags

NGSS.MS-PS1-1

What is the total number of atoms in this formula? $H_2O_2$  

• 2

• 4

• 3

Tags

NGSS.MS-PS1-1

• 4

• 3

• 2

• 6

Tags

NGSS.MS-PS1-1

Which of the following elements is least likely to form a compound?

• Hydrogen

• Sodium

• Argon

• Potassium

Which of the following is a molecule of a compound?

• $H_2$

• $Cl_2$

• $H_2O$

• $F_2$

Tags

NGSS.MS-PS1-1

Which does not belong in the group?

• Sodium

• Glucose

• carbon

• Element

Is this an element or a compound?  $CaSO_4$  

• Element

• Compound

Tags

NGSS.MS-PS1-1