CHEMICAL INTERACTIONS INVESTIGATION 1: SUBSTANCES

KEY CONCEPTS

• A SUBSTANCE IS A FORM OF MATTER WITH A UNIQUE COMPOSITION AND DISTINCT PROPERTIES.

• CHEMISTRY IS THE STUDY OF SUBTANCES AND THEIR INTERACTIONS.

KEY CONCEPTS

• CHEMICAL NAMES GIVE INFORMATION ABOUT THE COMPOSITION OF SUBSTANCES (like its ingredients)

• CALCIUM CARBONATE IS MADE OF Calcium (Ca) and Carbonate (CO3). Sodium Chloride (salt) is made of Sodium (Na) and Chloride (Cl).

• CHEMICAL FORMULAS TELL THE COMPOSITION OF THE SUBSTANCE. (like an exact recipe)

• The formula for calcium carbonate is CaCO3, which means 1part Ca (calcium), 1part C (carbon) and 3 parts O (oxygen).

KEY CONCEPTS

• A CHEMICAL REACTION OCCURS WHEN SUBSTANCES INTERACT TO FORM NEW SUBSTANCES (PRODUCTS)

• A REACTION GIVES EVIDENCE THAT STARTING SUBSTANCES CHANGE INTO NEW, DIFFERENT SUBSTANCES.

• RUST FORMS FROM THE REACTION OF IRON WITH THE OXYGEN IN WATER.

SUMMARY

• SUBSTANCES CAN BE DESCRIBED WITH– COMMON NAME (TABLE SALT)– CHEMICAL NAME (SODIUM CHLORIDE)– CHEMICAL FORMULA (NaCl)