1. Section 3.1 The Elements Objectives 1.To learn about the relative abundances of the elements 2.To learn the names of some elements 3.To learn the symbols of some elements

2. Section 3.1 The Elements All of the materials in the universe can be chemically broken down into about 100 different elements. WordsCompounds Compounds are made by combining atoms of the elements just as words are constructed from the letters in the alphabet. The Elements

3. Section 3.1 The Elements A. Abundances of Elements Which elements are the most common by mass on earth?

4. Section 3.1 The Elements A. Abundances of Elements Which elements are the most common in the human body by mass?

5. Section 3.1 The Elements Element can have several meanings Element Microscopic form Single atom of that element Macroscopic form Sample of that element large enough to weigh on a balance Generic form When we say the human body contains the element sodium or lithium, we do not mean that free elemental sodium or lithium is present. Rather we mean that atoms of these elements are present in some form.

6. Section 3.1 The Elements B. Names and Symbols for the Elements Each element has a name and a symbol. Some element names come from descriptions of the element’s properties in Latin or Greek:

7. Section 3.1 The Elements B. Names and Symbols for the Elements Some elements are named after planets:

8. Section 3.1 The Elements B. Names and Symbols for the Elements Some element names are derived from places:

9. Section 3.1 The Elements B. Names and Symbols for the Elements Some elements are named after famous scientists:

10. Section 3.1 The Elements B. Names and Symbols for the Elements Element symbols include: 1 st letter of the name capitalized 1 st letter of the name capitalized + lower case 2 nd letter

11. Section 3.1 The Elements B. Names and Symbols for the Elements Element symbols include: Symbols where the 2 nd letter is not the 2 nd letter in the name. Symbols that come from the Latin or Greek names for the element.