WHAT IS SOMETHING MADE OF?

CHEMICAL COMPOSITION MEANS THE CHEMICAL MAKE UP OF A SUBSTANCE. IN OTHER WORDS IF YOU WANTED TO KNOW THE CHEMICAL COMPOSITION OF WATER, YOU WOULD REFER TO THE CHEMICAL FORMULA FOR WATER.

CHEMICAL FORMULA FOR WATER	CHEMICAL COMPOSITION OF WATER
	2 ATOMS OF HYDROGEN AND 1 ATOM OF OXYGEN

NOTE: THE SUBSCRIPTS TELL YOU THE NUMBER OF ATOMS OF THE ELEMENT.

LOOK AT SOME OTHER EXAMPLES:

CHEMICAL NAME	CHEMICAL FORMULA	CHEMICAL COMPOSITION
SODIUM CHLORIDE		1 ATOM OF SODIUM AND 1 ATOM OF CHLORINE
CALCIUM NITRATE		1 ATOM OF CALCIUM, 2 ATOMS OF NITROGEN AND 6 ATOMS OF OXYGEN
AMMONIUM CARBONATE		2 ATOMS OF NITROGEN, 8 ATOMS OF HYDROGEN, 1 ATOM OF CARBON AND 3 ATOMS OF OXYGEN
IRON (III) HYDROXIDE		1 ATOM OF IRON, 3 ATOMS OF OXYGEN, 3 ATOMS OF HYDROGEN

ACTIVITY

YOU NEED ONLY DO ONE OF THE FOLLOWING ACTIVITIES. IT IS YOUR CHOICE.

GIVE THE CHEMICAL COMPOSITION FOR THE SUBSTANCES LISTED IN THE TABLE:

CHOICE 1:

THERE IS A TABLE OF SUBSTANCES LISTED ON THE TOP OF PAGE 117 OF THE CHEMICALS IN ACTION TEXTBOOK. WRITE THE COMPOSITION OF EACH OF THESE SUBSTANCES.

CHECK YOUR ANSWERS BY OBTAINING THE ANSWER KEY FROM YOUR TEACHER. IF YOU HAVE A PASSWORD, CLICK HERE.

CHOICE 2:

WRITE THE COMPOSITION OF THE SUBSTANCES LISTED IN THE TABLE ON PAGE 211 OF THE PHYSICAL SCIENCE AN INTRODUCTORY STUDY TEXTBOOK.

CHECK YOUR ANSWERS WITH THE TEACHER IN YOUR ROOM. THEY SHOULD HAVE THE PRINTED ANSWERS FROM THE TEACHER'S GUIDE TO THE TEXTBOOK PHYSICAL SCIENCE AN INTRODUCTORY STUDY.

CHOICE 3:

DO THIS ASSIGNMENT. GO.

CHECK YOUR ANSWERS BY COMPARING THEM TO THE ANSWER KEY.

ASSIGNMENT

NO ASSIGNMENT. (SIGH!!) YOU WILL HAVE LOTS OF PRACTICE COUNTING THE ATOMS OF EACH ELEMENT IN FURTHER LESSONS.

ASSESSMENT

YOU WILL USE THE SKILL OF TELLING THE CHEMICAL COMPOSITION OF SUBSTANCES IN OTHER LESSONS IN THIS UNIT. YOU WILL BE SCORED ON THIS WHEN YOU HAVE TO USE THIS SKILL. ALSO, YOU WILL BE GIVEN SPECIFIC CHEMICAL COMPOSITION QUESTIONS ON YOUR UNIT TEST.