Review Metric Conversion quiz

1
Class Topics
Title Biology 9/17/07
Objectives

• To learn about the basic chemistry.

• Handouts
• Chapter 2 packet
• Periodic Table

• Review Metric Conversion quiz
• 2nd hour metric conversion quiz
• Notes Chemistry
• When one door closes, another door opens. But we
  often look so long and so regretfully upon the
  closed door, that we do not see the ones which
  opened for us.
• Alexander Graham Bell

Monday, November 16, 2009 1006 AM
2
Class Assignments
2nd hour biology
By When
What

• Metric measurements and conversions quiz 9/17/07
• Read 31-34 9/18/07
• Packet W.S. Atomic Dimensions 9/18/07
• Due this class period
• Due next class period
• Due in the future

3
Class Assignments
6th and 7th biology
By When
What

• Read 31-34 9/17/07
• Packet W.S. Atomic Dimensions 9/18/07
• Due this class period
• Due next class period
• Due in the future

4
Conversion postquiz Activities

• Hand in quiz
• Read 31-34

5
Matter

• Definition
• Any that takes up space (volume) and has mass
• Mass is different than weight
• Mass is the amount of matter in an object
• Weight is the pull of gravity on an object
• Everything in the universe is matter
• Composed of atoms

6
Elements

• Pure substances that cannot be broken down into
  simpler substances
• 116 elements (92 natural)
• Composed of only one type of atom
• Examples
• Periodic Table

7
Elements

• Na sodium formerly called natrium
• K potassium formerly called kalium
• Fe - iron formerly ferrum (Latin)
• Cu copper formerly cuprum (Greek)
• Ag silver Latin for argentum
• Sn Tin comes from Latin for Stannum
• Sb Antimony formerly stibium (Latin)
• W Tungsten formerly wolfram (German)
• Au Gold formerly Aurum (Latin)
• Hg Mercury from Greek
• Pb Lead - plumbum

8
Atoms

• Smallest particle of an element
• Retains the property of that element
• Models of atoms
• Nucleus
• Proton, neutron
• Electron energy levels
• electrons

9
What do you know?

• All matter is made up of atoms
• Atoms are the smallest part of a substance and
  are very small.
• Atoms cannot be divided
• All atoms of one element are identical atoms of
  different elements are different
• Atoms of one element cannot be changed into atoms
  of another element

10
Subatomic particles

• Protons
• charged
• Neutrons
• no charge, same size as protons
• Electrons
• - charge, much smaller than protons
• Protons and neutrons are together in the nucleus.
  
• Electrons are outside the nucleus.

11
Protons

• The number of protons
• Determines identity of the atom
• If it has 3 protons it has to be lithium
• If it has 12 protons it has to be magnesium
• If it has 92 protons it has to be uranium
• If it is chlorine it must have protons.
• If it is copper it must have protons.

12
Atomic number

• The number of protons in an atom does not change
  and it is called the atomic number.
• It is always found in the Periodic Table.
• The protons can be changed but not through
  Chemistry.

13
Practice

• Atomic number of oxygen
• 8
• Atomic number of zinc
• 30
• protons in bromine
• 35
• protons in gold
• 79
• Element with 44 protons
• Ruthenium (RU)

14
Neutrons

• The neutrons have no effect on the chemistry of
  an atom.
• They provide bulk
• keep protons from repelling each other
• protons are all and therefore repel each
  other).
• Determined by subtracting the atomic number from
  the atomic mass

15
Electrons

• Electrons are tiny
• smaller than protons,
• outside the nucleus
• () charge.
• All atoms have a neutral charge
• same number of protons () and electrons (-).
• All chemical reactions have to do with electrons.
• Found in energy levels
• 2, 8, 8, 16

16
Building an atom

• http//www.pbs.org/wgbh/aso/tryit/atom/
• Show me your completed carbon atom