Welcome to the Welcome to the World of World of ChemistryChemistry

The Language of The Language of ChemistryChemistryThe Language of The Language of ChemistryChemistry• CHEMICAL _____________CHEMICAL _____________ - - – pure substances that cannot be decomposed by pure substances that cannot be decomposed by

ordinary means to other substances.ordinary means to other substances.

SodiumBromine

Aluminum

The Language of The Language of ChemistryChemistryThe Language of The Language of ChemistryChemistry

• The elements, The elements, their names, and their names, and symbols are given symbols are given on theon the PERIODIC PERIODIC TABLETABLE

• How many How many elements are elements are there?there? 117 elements have been identified117 elements have been identified

• 82 elements occur naturally on Earth82 elements occur naturally on EarthExamples: gold, aluminum, lead, oxygen, carbonExamples: gold, aluminum, lead, oxygen, carbon•35 elements have been created by scientists35 elements have been created by scientistsExamples: technetium, americium, seaborgiumExamples: technetium, americium, seaborgium

The Periodic TableThe Periodic Table

Dmitri Mendeleev (1834 - 1907)Dmitri Mendeleev (1834 - 1907)

Glenn Glenn SeaborgSeaborg

(1912-1999)(1912-1999)• Discovered 8 Discovered 8

new elements.new elements.

• Only living Only living person for person for whom an whom an element was element was named.named.

Branches of Chemistry

• Many major areas of study for Many major areas of study for specializationspecialization

• Several career opportunitiesSeveral career opportunities

• Also used in many other jobsAlso used in many other jobs

1. Organic Chemistry

• Organic is the study of Organic is the study of matter that contains carbonmatter that contains carbon

• Organic chemists study the Organic chemists study the structure, function, structure, function, synthesis, and identity of synthesis, and identity of carbon compoundscarbon compounds

• Useful in petroleum Useful in petroleum industry, pharmaceuticals, industry, pharmaceuticals, polymerspolymers

2. Inorganic Chemistry

• Inorganic is the Inorganic is the study of matter that study of matter that does NOT contain does NOT contain carboncarbon

• Inorganic chemists Inorganic chemists study the structure, study the structure, function, synthesis, function, synthesis, and identity of non-and identity of non-carbon compoundscarbon compounds

• Polymers, Polymers, MetallurgyMetallurgy

3. Biochemistry

• Biochemistry is Biochemistry is the study of the study of chemistry in chemistry in living thingsliving things

• Cross between Cross between biology and biology and chemistrychemistry

• Pharmaceuticals Pharmaceuticals and geneticsand genetics

4. Physical Chemistry

• Physical Physical chemistry is the chemistry is the physics of physics of chemistry… the chemistry… the forces of matterforces of matter• Much of p-chem Much of p-chem

is computationalis computational• Develop Develop

theoretical ideas theoretical ideas for new for new compoundscompounds

5. Analytical Chemistry

• Analytical Analytical chemistry is the chemistry is the study of high study of high precision precision measurementmeasurement

• Find composition Find composition and identity of and identity of chemicalschemicals

• Forensics, quality Forensics, quality control, medical control, medical teststests