chem161sg_chapter1

chem161sg_chapter1 - Chemistry 161 Solid GEMS Professor...

Info iconThis preview shows pages 1–7. Sign up to view the full content.

View Full Document Right Arrow Icon
Chemistry 161 Solid GEMS Professor Vassilian Text: General Chemistry 4th Edition By: John W. Hill Ralph H. Petrucci Terry W. McCreary Scott S. Perry Book 1 1
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Biology Medicine Agriculture Engineering Environmental Science Forensic Science Etc. Chemistry (all around you) 2
Background image of page 2
Chapter 1 Chemistry: Matter and Measurement Chemistry is the study of compositiion, structure, properties and transformation of matter. Matter is anything that occupies space and has mass. The building blocks of matter are atoms or molecules. The A is the basic unit of all elements that enters into chemical transform (reactions) TOM ations 118 elements have been identified Atoms have been given symbols to identify them (periodic table) H hydrogen O oxygen Cu copper N a s o d i u m ( n a t r i u m ) K p o t a s s i u m ( k a l i u m ) F e i r o n ( f e r r u m ) 3
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Defintions: Molecule: a group of chemically bonded atoms that reflect the characterisitics of that substance (two or more atoms that are chemically united ) e.g. an atom of hydrogen is H a molecule of hydrogen is H 2 Why: Hydrogen exists as H-H (H bonded to H) i.e. diatomic (two atoms) e.g. an atom of iron is Fe i.e. iron atom and iron molecule are the same since iron is monoatomic . Other examples: O 2 , F 2 , Cl 2 P 4 tetra-atomic , S 8 octa-atomic Compounds: are made when different types of atoms combine . e.g. the compound H 2 O is made of two H atoms and one O atom. This gives us a molecule of H 2 O. e.g. CO, carbon monoxide contains two atoms H 2 SO 4 , sulfuric acid contains seven atoms C O i s diatomic H 2 O is triatomic H 2 SO 4 is hepta-atomic Note: An atom of Hydrogen is H A molecule of Hydrogen is H 2 A molecule of Water is H 2 O There is no atom of H 2 O; since H 2 O is a compound one always talks about a molecule of that compound . A molecule is to a compound as an atom is to an element. 4
Background image of page 4
Classification of Matter Matter Pure Substance by physical means Homogeneous Heterogeneous Compounds Elements separated Mixtures H 2 S O 2 - water (H 2 O) -sulfuric acid, (H 2 SO 4 ) to elements by chemical techniques broken down - composition and properties different from one part to another - oil and water - gasoline + water These are solutions that have uniform compositions and properties - sugar dissolved in water - salt dissolved in water homogenized milk is a heterogeneous mixture! (you can see the fat globules through a microscope) 5
Background image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Properites of Matter 1. Physical Properites and Physical Change A physical property of a substance is a property that does not alter the chemical composition of a substance. The identity of the substance remains unchanged . These properties include; color , melting point , boiling point , solubility , etc . - gold is malleable
Background image of page 6
Image of page 7
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 09/30/2011 for the course CHEM 161 taught by Professor Vacillian during the Spring '08 term at Rutgers.

Page1 / 16

chem161sg_chapter1 - Chemistry 161 Solid GEMS Professor...

This preview shows document pages 1 - 7. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online