COMPOUNDS
PRESENTED BY: S M OBAIDUL ARFIN. INSTRUCTOR:  Ms. AFSHEEN KHALIL. PRESENTATION DATE: 30 SEPTEMBER, 2006.
<ul><li>All substances have mass and therefore must be composed of atoms.  </li></ul><ul><li>These atoms and how they asse...
 
COMPOUNDS <ul><li>A compound is a substance that is formed by chemically combining two or more elements. </li></ul><ul><li...
COMPOUNDS <ul><li>Microscopic view of the molecules of the compound water (gas phase). Oxygen atoms are red and hydrogen a...
COMPOUNDS <ul><li>Note that a compound:  </li></ul><ul><li>-consists of atoms of two or more different elements  bound tog...
COMPOUNDS <ul><li>Names of some compounds:  </li></ul><ul><li>- Carbon dioxide, </li></ul><ul><li>- Ethanol, </li></ul><ul...
COMPOUNDS <ul><li>Elements combine to form chemical compounds that are often divided into two categories.  </li></ul><ul><...
COMPOUNDS <ul><li>Ionic Compounds </li></ul><ul><li>Contain positive and negative ions (Na+Cl-). </li></ul><ul><li>Solids ...
THANK U
Upcoming SlideShare
Loading in...5
×

Compounds[1].

1,914
-1

Published on

Published in: Technology, Education
0 Comments
0 Likes
Statistics
Notes
  • Be the first to comment

  • Be the first to like this

No Downloads
Views
Total Views
1,914
On Slideshare
0
From Embeds
0
Number of Embeds
1
Actions
Shares
0
Downloads
34
Comments
0
Likes
0
Embeds 0
No embeds

No notes for slide

Compounds[1].

  1. 1. COMPOUNDS
  2. 2. PRESENTED BY: S M OBAIDUL ARFIN. INSTRUCTOR: Ms. AFSHEEN KHALIL. PRESENTATION DATE: 30 SEPTEMBER, 2006.
  3. 3. <ul><li>All substances have mass and therefore must be composed of atoms. </li></ul><ul><li>These atoms and how they assemble themselves in the substance determines their chemical and physical properties. </li></ul><ul><li>Substances can be classified according to how these atoms are assembled and is known as “Classification of Matter”. </li></ul><ul><li>All matter falls into one of three categories: elements, compounds or mixtures. </li></ul>
  4. 5. COMPOUNDS <ul><li>A compound is a substance that is formed by chemically combining two or more elements. </li></ul><ul><li>Water is formed when the elements hydrogen and oxygen combine. </li></ul><ul><li>Its chemical formula , H 2 O, tells us the number and type of each atom in the compound, so water molecules contain 2 hydrogen atoms combined with 1 oxygen atom. </li></ul>
  5. 6. COMPOUNDS <ul><li>Microscopic view of the molecules of the compound water (gas phase). Oxygen atoms are red and hydrogen atoms are white. </li></ul>
  6. 7. COMPOUNDS <ul><li>Note that a compound: </li></ul><ul><li>-consists of atoms of two or more different elements bound together , </li></ul><ul><li>-can be broken down into a simpler type of matter (elements) by chemical means (but not by physical means), </li></ul><ul><li>-has properties that are different from its component elements, </li></ul><ul><li>-always contains the same ratio of its component atoms. </li></ul>
  7. 8. COMPOUNDS <ul><li>Names of some compounds:  </li></ul><ul><li>- Carbon dioxide, </li></ul><ul><li>- Ethanol, </li></ul><ul><li>- Glucose, </li></ul><ul><li>- Chlorophyll. </li></ul>
  8. 9. COMPOUNDS <ul><li>Elements combine to form chemical compounds that are often divided into two categories. </li></ul><ul><li>Metals often react with nonmetals to form ionic compounds . </li></ul><ul><li>Nonmetals combine with each other to form covalent compounds , which exist as neutral molecules. </li></ul>
  9. 10. COMPOUNDS <ul><li>Ionic Compounds </li></ul><ul><li>Contain positive and negative ions (Na+Cl-). </li></ul><ul><li>Solids such as table salt (NaCl). </li></ul><ul><li>High melting and boiling points. </li></ul><ul><li>Strong force of attraction between particles. </li></ul><ul><li>Separate into charged particles in water to give a solution that conducts electricity. </li></ul><ul><li>Covalent Compounds </li></ul><ul><li>Exist as neutral molecules (C6H12O2). </li></ul><ul><li>Solids, liquids, or gases (C6H12O6(s), H2O(l), CO2(g)). </li></ul><ul><li>Lower melting and boiling points (i.e., often exist as a liquid or gas at room temperature). </li></ul><ul><li>Relatively weak force of attraction between molecules. </li></ul><ul><li>Remain as same molecule in water and will not conduct electricity. </li></ul>
  10. 11. THANK U
  1. A particular slide catching your eye?

    Clipping is a handy way to collect important slides you want to go back to later.

×