Seventh Grade 1.6 Atoms, Physical, and Chemical Changes

Sulfuric Acid, H2SO4 is a chemical compound used in drain cleaners. How many different elements make up this chemical compound

• 3

• 4

• 2

• 7

Silver Nitrate, AgNO3, is a chemical compound used in photography. How many total atoms make up this chemical compound?

• 3

• 4

• 5

• 2

Which of the following is an element?

• H20

• NaCl

• CO

• C

Which of the following contains an element first and then a compound with that element?

• NH3-- He

• CO2-- C

• NaCl-- Co

• O --- N2O

CO2 is a example of a

• Chemical Formula

• Chemical Reaction

• Chemical Equation

How many elements are in C3H7NO2

• 3

• 12

• 4

• 2

How many atoms are in AgNO3

• 3

• 4

• 5

• 6

NaCl is the chemical formula of table salt. What is the ratio of Sodium (Na) atoms to Chloride (Cl) atoms?

• 1:1

• 1:2

• 2:1

• 3:1

Water has the chemical formula H2O. What is the ratio of Hydrogen atoms to Oxygen atoms?

• 2:1

• 1:2

• 1:1

• 3:1

Melting Ice is an example of

• Physical Change

• Chemical Change