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Date: 10-8-13 Day Plan: 1 ) Finish Isotope and Atom Packet 2) Start History of an Atom - PowerPoint PPT Presentation


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Date: 10-8-13 Day Plan: 1 ) Finish Isotope and Atom Packet 2) Start History of an Atom Opener : Look at the picture below. Exampling A) How are all of these atoms alike B) How are all of these atoms different C) Explain what an Isotope is . Atoms & Their Isotopes – Paragraph #1 .

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  • Date: 10-8-13

  • Day Plan:

    • 1) Finish Isotope and Atom Packet

    • 2) Start History of an Atom

  • Opener : Look at the picture below. Exampling

  • A) How are all of these

    atoms alike

  • B) How are all of these atoms

    different

  • C) Explain what an Isotope is


Atoms their isotopes paragraph 1
Atoms & Their Isotopes – Paragraph #1

  • Entire world is composed of atoms

  • Atoms are composed of

    • Proton (charge +1) weigh 2000x more

    • Neutron (no charge) than electrons

    • Electron (charge -1)

  • Properties of an atom are determined by the number of P+, N0, and E-


Key questions
Key Questions

  • 1. The atomic number [Z] tells the reader the number of protons

  • 2. The mass number [A] tells the reader the number of protons and neutrons.


  • 3. The number of protons is equal to the number of electrons.

  • 4. The electrical charge of an atom with an equal number of protons and electrons is neutral or no charge.

  • 5. The protons and neutrons are located in the nucleus of an atom.

  • 6. The two sodium isotopes have the same number of protons and electrons.

  • 7. The two sodium isotopes have different number of neutrons.


Isotopes of an element
Isotopes of an element

  • Atom has the same number of protons but a different number of neutrons

  • Neutral atoms have equal number of protons

    and

    electrons

Atomic Symbol Notation

A Mass Number (number of protons and neutrons)

X Atomic Symbol

Z Atomic Number (number of protons)



Exercises
Exercises an atom of another element:

  • 1. Similarities include:

    • They are the same element

    • They each have 17 protons

    • They each have 17 electrons

  • 2. Differences include:

    • They have different mass numbers.

    • Cl-35 has 18 neutrons

    • Cl-37 has 20 neutrons.


O an atom of another element:

S

Kr


O an atom of another element:

N

S

H

H

Mg

Mg

U

Kr


Problems

1 fm = 1 x 10 an atom of another element:-15 m

1 pm = 1 x 10-12 m

Problems

  • 1. The radius of a Cl nucleus is 4.0 fm, and the radius of a Cl atom is 100 pm. How many times larger is the diameter of the Cl atom than the diameter of a Cl nucleus?

  • 2. Two objects that have the same ratio of length.


Problems1

Volume = 4/3(pi)*r an atom of another element:3

Problems

  • 3. How many times larger is the volume of the atom than the volume of the nucleus?



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