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The Chemistry of Life

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Title: The Chemistry of Life Author: Caleb Mathis Last modified by: cmathis Created Date: 8/13/2008 12:21:09 AM Document presentation format: On-screen Show (4:3) – PowerPoint PPT presentation

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Title: The Chemistry of Life


1
(No Transcript)
2
Bell Ringer
  • Answer each question with True or False.
  • 1) The prediction part of the scientific method
    can be written as if the hypothesis is true,
    then ___.
  • 2) The scientific method ends with data analysis
  • 3) If something moves, we can consider it to be
    alive.
  • 4) Metabolism energy
  • 5) Homeostasis is another way of saying that
    living things are organized in a way that makes
    sense.

3
The Chemistry of Life
4
First, Some Terms...
  • Matter

5
First, Some Terms...
  • Matter anything that occupies space and has
    mass.
  • Mass

6
First, Some Terms...
  • Matter anything that occupies space and has
    mass.
  • Mass the amount of matter an object has.

7
First, Some Terms...
  • Matter anything that occupies space and has
    mass.
  • Mass the amount of matter an object has.
  • Mass is NOT the same as weight.

8
First, Some Terms...
  • Matter anything that occupies space and has
    mass.
  • Mass the amount of matter an object has.
  • Mass is NOT the same as weight.
  • Weight the force produced by gravity pulling
    down on mass.

So, where would your weight be different?
9
The moons gravity is weaker than Earths, so you
would weigh less. Would your mass
change on the moon?
10
The moons gravity is weaker than Earths, so you
would weigh less. Would your mass
change on the moon? NO!
11
Some Chemistry...
  • Element a substance that cannot be broken down
    into simpler kinds of matter.
  • All things on earth (living or nonliving) are
    made up of elements.
  • Over 100 elements have been discovered.

12
Some Chemistry...
  • Element a substance that cannot be broken down
    into simpler kinds of matter.
  • All things on earth (living or nonliving) are
    made up of elements.
  • Over 100 elements have been discovered.

What elements do you know of?
13
Some Chemistry...
  • Element a substance that cannot be broken down
    into simpler kinds of matter.
  • All things on earth (living or nonliving) are
    made up of elements.
  • Over 100 elements have been discovered.

Where can we find a list of all the elements?
14
(No Transcript)
15
Periodic Table
  • The periodic table tells us a chemicals
  • Atomic Number ?
  • Symbol ?
  • Atomic Mass ?

10 Ne 20.18
16
Some Chemistry...
  • Four elements are of utmost importance to life on
    earth.
  • They are found in over 90 of the mass of all
    living things.

17
Some Chemistry...
  • Four elements are of utmost importance to life on
    earth.
  • They are found in over 90 of the mass of all
    living things.

Carbon
Oxygen
Hydrogen
Nitrogen
18
The Atom
  • The smallest particle of an element is an atom.

19
The Atom
  • The smallest particle of an element is an atom.
  • Atoms determine the structure and properties of
    the matter they compose.
  • Atoms are so small, they can not be directly
    observed.

20
The Atom
  • The middle of the atom is called the nucleus.
  • It contains protons ( charge)
  • And neutrons (no charge)

21
The Atom
  • The middle of the atom is called the nucleus.
  • It contains protons ( charge)
  • And neutrons (no charge)
  • An elements atomic number is the number of
    protons it contains.

22
The Atom
  • The middle of the atom is called the nucleus.
  • It contains protons ( charge)
  • And neutrons (no charge)
  • An elements atomic number is the number of
    protons it contains.

What is this atoms atomic number?
23
The Atom
  • The middle of the atom is called the nucleus.
  • It contains protons ( charge)
  • And neutrons (no charge)
  • An elements atomic number is the number of
    protons it contains.

4 Be 9.01
24
The Atom
  • The middle of the atom is called the nucleus.
  • It contains protons ( charge)
  • And neutrons (no charge)
  • An elements mass number is the number of
    protons neutrons.

25
The Atom
  • The middle of the atom is called the nucleus.
  • It contains protons ( charge)
  • And neutrons (no charge)
  • An elements mass number is the number of
    protons neutrons.

What is this atoms mass number?
26
The Atom
  • The middle of the atom is called the nucleus.
  • It contains protons ( charge)
  • And neutrons (no charge)
  • An elements mass number is the number of
    protons neutrons.

4 Be 9.01
27
The Atom
4 Be 9.01
  • So, whats up with the decimal in Berylliums
    mass number?

28
The Atom
4 Be 9.01
  • So, whats up with the decimal in Berylliums
    mass number?
  • All atoms of the same element have the same
    number of protons.
  • Thats what identifies it as that specific
    element!

29
The Atom
4 Be 9.01
  • So, whats up with the decimal in Berylliums
    mass number?
  • All atoms of the same element have the same
    number of protons.
  • Atoms of the same element, however, may have a
    different number of neutrons.
  • Atoms of the same element that have different
    numbers of neutrons are called isotopes.

30
The Atom
4 Be 9.01
  • So, whats up with the decimal in Berylliums
    mass number?
  • Berylliums mass number is an average of the
    mass of its different isotopes.

31
The Atom
  • Electrons, negatively charged particles, move
    around the nucleus.
  • Electrons have very little mass.
  • Most important, electrons are involved in
    bonding.

32
Scroobius Pip vs. Dan Le Sac Development
33
(No Transcript)
34
Discover an Element
  • Your job is to create a mini-poster about an
    element.
  • The poster should include
  • The name of the element and its symbol.
  • The atomic number and the atomic mass number.
  • What phase is your element found in at room
    temperature?
  • Where is this element found in nature?
  • How is your element used commercially (by
    humans)?
  • What compounds is your element found within?
  • Does your element have isotopes? What are they?
  • At least one interesting fact about your element.
  • At least two illustrations
  • Use color, make it look nice!

35
(No Transcript)
36
Exit Slip
  • Answer the following questions based upon the
    atomic nucleus pictured to the right.
  • What element is this? a) Hydrogen b)
    Lithium c) Nitrogen d) Oxygen

37
Exit Slip
  • Answer the following questions based upon the
    atomic nucleus pictured to the right.

2) What is the atomic number of this element? a)
7 b) 4 c) 3
d) 8 3) How can we tell that this atom may
be an isotope? a) there are more neutrons than
protons b) there are more protons than
neutrons c) there are enough neutrons to
balance the charge of the protons d)
this atom has an overall negative charge
38
Exit Slip
  • Answer the following questions based upon the
    atomic nucleus pictured to the right.

4) If a proton was added to this atom, what would
happen? a) it would become an isotope of the
original element b) it would become a new
element c) there would be no change d) its
atomic mass would increase, but not its atomic
number
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