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Atoms Molecules Elements Compounds

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urian
23 diapositives · 7.1K Views · Aug 04, 2014

Atoms Molecules Elements Compounds. Atom. The smallest particle that can still be identified as the matter it came from. Atoms cannot be created or destroyed. Consists of Protons (+), Electrons (-), and Neutrons (N). Video Clips: http:// www.youtube.com/watch?v=R1RMV5qhwyE

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  1. Atoms Molecules Elements Compounds

  2. Atom • The smallest particle that can still be identified as the matter it came from. • Atoms cannot be created or destroyed. • Consists of Protons (+), Electrons (-), and Neutrons (N). • Video Clips: http://www.youtube.com/watch?v=R1RMV5qhwyE • http://www.youtube.com/watch?v=yQP4UJhNn0I

  3. Atomic Structure

  4. Atoms consist of three subatomic particles: • electrons • electrons are negatively charged particles • protons • protons are positively charged particles • neutrons • neutrons have no charge

  5. Electrons of an atom: • Small negatively charged particle • Orbit, circle, around the nucleus • Have no mass. • Number of electrons = number of protons

  6. Protons of an atom: • small, positively charged particles • reside in the nucleus • along with the neutron, make up most of the mass of the atom • the number of protons is what defines the type of a particular atom. • number of protons = number of electrons

  7. Neutrons of an atom: • small particles with no charge • reside in the nucleus • along with the proton, make up most of the mass of the atom

  8. Nucleus of an atom: • The dense area in the center of an atom. • Inside the nucleus of every atom are smaller particles called protons, and neutrons. Nucleus

  9. Element • Matter that is made of only one kind of atom is an element. • Cannot be broken down into a simpler type of matter by either physical or chemical means • Carbon, hydrogen, and oxygen are all elements. • Song: http://www.sciencekids.co.nz/videos/chemistry/elementsong.html

  10. Each element has a name and symbol:

  11. How are they arranged in the periodic table? • Elements are arranged in order of their atomic number. • The atomic number is the number of protons in the nucleus. Chemistry Rap: • http://www.youtube.com/watch?v=Apr7MdbHGQo The New Periodic Table Song: • http://www.youtube.com/watch?v=zUDDiWtFtEM

  12. Molecule • A molecule consists of two or more atoms of the same element, or different elements, that are chemically bound together. • In the animation above, two nitrogen atoms (N + N = N2) make one Nitrogen molecule . • Video:

  13. Example of Molecules

  14. More Examples

  15. Some molecules are more complex: A protein molecule: Some fat molecules: cholesterol

  16. Molecules can be represented many ways: CH4 H2O Chemical Formula: H H Structural Formula: O Ball and Stick Model: Space Filling Model:

  17. Compound • Atoms of two or more different elements bonded together. • In the animation above, water (H20) is a compound made of Hydrogen and Oxygen.

  18. Video The relationship between atoms, elements, molecules and compounds. • http://www.youtube.com/watch?v=cV4jJZCIMPo

  19. Examples:

  20. Four different molecules:Which are compounds?

  21. What are each of these?Atom, Element,Molecule,orCompound

  22. Practice with Vocabulary:

  23. Chemical Formula # of elements # of atoms total # of Carbon atoms Chemical Formulas show how many atoms of each element are in one molecule: O2 1 2 0 H2O 2 3 0 C3H8O 3 12 3 C6H12O4Cl 4 23 6