Physical & Chemical Properties The Periodic Table Physical & Chemical Properties

CHEMISTRY of Atoms The Periodic Table Mendeleev’s Table 1868-1871 Mural at St. Petersburg University, Russia

Current Periodic Table Los Alamos National Lab http://periodic.lanl.gov/index.shtml Elements in Song http://chemconnections.org/general/movies/leher-elements.swf

Figure: 01-06

Composition of the Earth’s Atmosphere Today: Figure: 01-06

Elements & Compounds Element: A substance that cannot be broken into simpler substances by chemical means, eg. Fe, Iron or S8 Sulfur FeS Compound: A substance with a constant composition that can be broken down into elements only by chemical processes,eg. FeS, Iron (II) sulfide

~ 500 new molecules are currently added / hr Chemistry & Matter How many different chemicals (atoms + molecules) do you think have been reported in the scientific literature? A) 100,000 B) 1,000,000 C) 10,000,000 D) 100,000,000 E) 1,000,000,000 CAS Registry : ~12,000 in 1907 ~ 500 new molecules are currently added / hr

Chemistry & Matter How many different chemicals (atoms + molecules) do you think have been reported in the scientific literature? A) 100,000 B) 1,000,000 C) 10,000,000 D) 100,000,000 *** E) 1,000,000,000 CAS Registry : ~12,000 in 1907; ~ 75 million in 2013; 100,000,000 reached in July 2015 ~ 500 new molecules are currently added / hr http://en.wikipedia.org/wiki/List_of_CAS_numbers_by_chemical_compound

Organization of Matter

Chemical Visualization: Atoms & Molecules Atomic Force Microscopy / Molecular Modeling Experimental / Mathematical Figure: 01-05a-d

States of Matter States of Matter Movie

States of Water

Chemistry & Matter Organization of atoms & molecules: atoms/elements  molecules/compounds Physical vs. Chemical Properties Solid (s), Liquid (l), Gas (g) Homogeneous vs. Heterogeneous Mixtures Chemical Reactions

Chemistry & Matter: Properties & States Physical vs. Chemical Properties Solid (s)  Liquid (l)  Gas (g) Homogeneous vs. Heterogeneous Mixtures Extensive vs. Intensive Properties Varies with amount (extensive) or does not vary with amount (intensive) Heat of reaction is extensive (Chemical Property), density is intensive (Physical Property)

A) I and II B) I and III C) II and III D) I, II and III QUESTION Extensive properties of a pure substance depend on sample size whereas intensive properties are characteristic of that substance. Which of these properties are intensive? I) Color II) Mass III) Density A) I and II B) I and III C) II and III D) I, II and III

A) I and II B) I and III C) II and III D) I, II and III Answer Extensive properties of a pure substance depend on sample size whereas intensive properties are characteristic of that substance. Which of these properties are intensive? I) Color II) Mass III) Density A) I and II B) I and III C) II and III D) I, II and III Correct Answer: B

Observations of Physical & Chemical Properties Physical-Chemical Properties Movie

Which of these are chemical properties of matter? QUESTION Which of these are chemical properties of matter? I) Rust/Corrosion II) Density III) Flammability IV) Melting point (Temperature: Solid  Liquid) A) I and II B) I and III C) II and IV D) III and IV

Which of these are chemical properties of matter? Answer Which of these are chemical properties of matter? I) Rust/Corrosion II) Density III) Flammability IV) Melting point (Temperature: Solid  Liquid) A) I and II B) I and III C) II and IV D) III and IV Correct Answer: B

Mixtures and Compounds Movie Using Physical & Chemical Properties: Distinguishing a Compound & a Mixture FeS Mixtures and Compounds Movie