* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Download Intro to Chemistry
Survey
Document related concepts
Transcript
Introduction of Chemistry What is chemistry? Chemistry • The science of the composition, structure, properties, and reactions of matter What is matter •Matter-anything that has mass and exists as a solid, liquid, or gas All Matter exists in 3 states • Solid-matter with a definite shape and volume • Liquid-matter with no definite shape but has volume • Gas-matter has neither shape nor volume but has mass 3 Phases of matter • All matter can be found in 1 of the 3 states (mainly dependent upon temperature) Intro to chemistry: • Properties both physical and chemicals come from the actual structure of the element’s atom or atomic design Purest from of matter • Element • Element-Elements cannot be reduced to simpler substances by normal chemical means: each element has its own unique properties/characteristics Properties of matter • Physical • Chemical Physical • Properties that are observed with the senses and can be found without destroying matter • • • • • • • • • • Color Length Mass Odor Shape Melting Point/Boiling Point Density Ductility Malleability Conductivity Chemical • Properties that show how matter reacts to other matter; end matter is different than original matter and has unique physical properties • Stable/Unstable • “All atoms want to obtain a full outer shell of electrons to become stable” ATOM • Smallest division of an element that retains all the physical and chemical characteristics of the element 3 major parts of an atom • Proton- “+” charge found in nucleus • Neutron- “neutral” charge particle in nucleus • Electron- “-” charge particle found around nucleus Atom Facts: • Atoms were first thought of by the Greeks over 2,400 years ago. Atom name comes from Greek meaning “indivisible”