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Topic: Isotopes, Elements, and Mass  (Read 4269 times)

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Offline AngelShare

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Isotopes, Elements, and Mass
« on: September 30, 2005, 01:55:40 PM »
I have three questions, well, three things I need to take notes on and study. In order to do that, I need to download a video (Cyber school) but it's taking forever so I started to look online. I just can't find these last three things though...

Describe an isotope. (I can define one but describe one? ???)
Describe the fundamental difference between elements.
Define atomic mass unit.
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Offline AngelShare

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Re:Isotopes, Elements, and Mass
« Reply #1 on: September 30, 2005, 02:54:14 PM »
Quote from: AngelShare on September 30, 2005, 01:55:40 PM
I have three questions, well, three things I need to take notes on and study. In order to do that, I need to download a video (Cyber school) but it's taking forever so I started to look online. I just can't find these last three things though...

Describe an isotope. (I can define one but describe one? ???)
Describe the fundamental difference between elements.
Define atomic mass unit.

I finally got the video to load but I wanted to check what I got from it to see if I'm right.

Isotopes have different masses but generally the same chemical properties.

Elements all have a different atomic mass.

An atomic mass unit is 1/12 the mass of a carbon atom.
« Last Edit: September 30, 2005, 02:55:15 PM by AngelShare »
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Offline jdurg

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Re:Isotopes, Elements, and Mass
« Reply #2 on: September 30, 2005, 10:34:03 PM »
You're almost there.

1):  Isotopes have different atomic masses but similar chemical properties.

2):  Elements all have different atomic numbers.

3):  Correct!
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