Chemistry I for Eelo students

1. Md. Faysal Ahamed Khan Welcome to the class of Chemistry I Course No. CHEM 211 Credit hours 3

4. Chemistry is the study of the properties, composition , and structure of matter , the physical and chemical changes it undergoes, and the energy associated (liberated or Absorbed) during those changes.

8. EOS

13. Air sugar in water Water Salt Gold Salad

14. Can it be separated by any physical process? Is the composition uniform? Can it be decomposed chemically? Matter Mixtures Pure substances yes No yes No yes No Homogeneous mixture (Solution) Heterogeneous mixture Compounds Elements

15. Matter Substances Mixtures Elements Compounds Homogeneous (Solutions) Heterogeneous

17. Uniform Not uniform Homogenous Mixtures Heterogeneous Mixtures Air sugar in water Salad

18. Now... Those that can’t be separated are Pure Substances Bur are they Compounds or Elements ? Water Salt Gold

19. Which can be decomposed by chemical means, like heating, electricity...and which cannot? Compounds Elements Water Salt Gold

21. GAS LIQUID SOLID Water as example

23. STATES OF MATTER Shape Volume Gas indefinite indefinite Liquid indefinite definite Solid definite definite

24. A one- or two-lettered designation derived from the name of the element Most symbols are based on English names: Hydrogen = H Neon = Ne Chromium = Cr EOS Note that the first letter is always capitalized and the second is lowercase

25. In some cases, symbols come from Latin names