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atoms and molecules

atoms and molecules

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    atoms atoms Presentation Transcript

    • Atoms, Quarks and Molecules OH!!!!!! MY!!!!! For my sweet Brittany and her Chemistry Friends!
      • Sometimes in Chemistry the teacher forgets to tell you some of the most important concepts because they think you already know it
      • This power point is to help organize the ideas of the basics of what atoms are and how they are organized
      • Atoms are small particles that are made up of electrons, protons and neutrons
      • Together the protons and neutrons create the nucleus
      • The electrons travel around the nucleus
    • Just like the planets travel around the sun, electrons travel around the nucleus
      • Atom
      • Planets around sun
    • Charges of Atoms
      • Protons have a positive charge +
      • Electrons have a negative charge -
      • Neutrons have a neutral charge 0
    • Subatomic Particles
      • Subatomic particles are a fancy name for the small particles that make up atoms.
      • For example: electrons, protons, neutrons
    • Size and Charge of subatomic particles
      • The three particles are different in size and charge. Neutrons have no charge and are the largest subatomic particles. They are roughly the size of both a proton and an electron put together. Protons are slightly smaller than neutrons and have a positive (+) charge. Electrons are the smallest of all and carry a negative (-) charge.
    • That’s right!
      • Protons = + Positive
      • Electrons = - Negative
      • Neutrons = 0 Neutral
    • In an atom(element) # protons = # electrons
      • If the # protons = # electrons
      • And protons are positive and electrons are negative
      • And Neutrons are neutral charge
      • An Atom or Element have a net neutral 0 Charge
      • Electrons are white and negative
      • Protons are yellow and positive
      • Neutrons are orange and have no charge
    • Size of Atoms Particles
      • Protons and neutrons are about the same size.
      • Electrons are very very very small
      • The mass of the atom is mostly in the nucleus
    • Remember:
      • The Nucleus is the protons and the neutrons together.
      • The words Atoms and Elements mean the same thing
      • The periodic chart is a chart that organizes the properties of atoms (elements)
      • The periodic chart can tell you a lot about the properties of the atom (element)
    • The Periodic Chart can tell you:
      • How much the atom’s mass is
      • How many electrons an atom has
      • How many protons an atom has
      • How many neutrons an atom has
      • It can also tell you how reactive the atoms are to one another. This reactivity helps atoms to form with one another.
    • A periodic chart has two numbers on each element
      • Atomic Number =
      • The number of protons and the number of electrons
      • Atomic Mass =
      • What the mass of one mole of the element is equal to
      • (a mole is 6 x 10 to the 23 rd atoms)
      • # protons = Atomic #
      • # electrons = Atomic #
      • # neutrons = Atomic Mass – Atomic Number
    •  
    • Helium: Look at a periodic Chart
      • Atomic # = 2
      • Atomic Mass = 4 (round it off)
      • # of protons = 2
      • # of electrons = 2
      • # of neutrons = 4 – 2 = 2
    • Barium: Look at a periodic Chart
      • Atomic Mass = 137
      • Atomic # = 56
      • # of protons = 56
      • # of electrons = 56
      • # of neutrons =
      • 137- 56 = 81
    • Find the number of electrons, protons and neutrons for the following elements (atoms) Phosphate Nitrogen Chlorine Sodium Carbon Calcium Hydrogen # neutrons # protons # electrons Atom
    • Find the number of electrons, protons and neutrons for the following elements (atoms) 16 15 15 Phosphate 7 7 7 Nitrogen 18 17 17 Chlorine 12 11 11 Sodium 6 6 6 Carbon 20 20 20 Calcium 0 1 1 Hydrogen # neutrons # protons # electrons Atom
    • A good interactive website that describes what atoms are built up of
      • http://www.chemistryland.com/ElementarySchool/BuildingBlocks/BuildingElements.html
      • Click here to see atom website
    • This website is an interactive website that will teach you about finding # of electrons, neutrons, protons Website to learn number of protons neutrons and electrons http://chemistry2.csudh.edu/lecture_help/protons.html
      • Website to teach element reactivity
      • http://www.webelements.com/
      • Demonstration of atoms forming a bond
      • http://faculty.ucc.edu/chemistry-pankuch/BaF2/BaF2.dcr
    •  
    • How to find number of electrons in orbitals
      • Website to show number of electrons in orbitals
      • http://education.jlab.org/qa/electron_number.html
      http://education.jlab.org/qa/electron_number.html