Focus Question: What are the most common

elements?

Elements and Atoms 4-3Mixtures and Solutions

Review Metals• There are more metals than

nonmetals on Earth.• Does the food we eat and the other

home products we use have metals in them?

• What are the most common elements in the things we buy?

• How many different elements are in the things we buy?

The Element Search• Many consumer products have lists of

ingredients• Ingredient names often suggest the

elements that are in the ingredient• Sodium chloride - Sodium & Chlorine

• Common ingredient - Sugar• Chemical formula - C6H12O6

• Carbon, Hydrogen, Oxygen

Elements in Products

• Search product packages for listings of elements or ingredients you know include certain elements.

• Record your findings on notebook sheet

• List product name in the first column• Write the chemical symbol for each

element present in the second column

• Analyze at least 10 products

Analysis

• Complete Part 2 of worksheet• Tally elements on scratch paper

• Write symbol for first element in product #1• Put a tally mark next to it• Repeat for each element in product #1• Product #2, 3… - if element is new, add to bottom

of list and put tally mark next to it. If element is the same as one already on the list, add a tally mark next to the element symbol

• Put a code next to the metal elements

Analysis Results• Which products produced the greatest

number of identifiable elements?• What was the largest number of

elements listed?• What was the largest number of metals

listed?• Where did all the elements in the

products come from?• What elements do you think are most

abundant in the Earth? In the Earth’s crust?

• What elements do you think are the most abundant in you?

Homework, Etc…• Read Earth Elements, pg 59-63 +

Qs• New Technologies, pg 64-67 + Qs• Ask a Chemist, pg 68-71 (no Qs)• Summary: Elements, pg 72-74 +

Qs• I-check 4 on Friday, 11/21• Unit test on Wednesday, 12/1