Atomic dating using isotopes lab report cherry blossom international dating service

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A block of pure carbon, for instance, is made up of two kinds, or isotopes, of carbon atoms that differ somewhat in mass but have almost identical chemical properties.Scientists continue to investigate atoms and have discovered even smaller constituents of which electrons, neutrons, and protons are made.This lesson helps students build their understanding of the properties of matter, specifically it will help them understand that average atomic mass is not a simple average, but is weighted according to percent abundance.Before working on this lesson, students should be familiar with the periodic table and should have had some basic instruction in the following concepts: isotopes, mass number, and atomic number.Students should be able to complete parts A, B, and C in one class period.

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If students appear to need more instruction on isotopes, you should review these concepts before proceeding with the lab.

To demonstrate that isotopes of an element have different masses; that isotopes are atoms of the same element that have different numbers of neutrons; and that atomic mass is the weighted average of the naturally occurring isotopes of an element.

This is the first in a three-lesson series about isotopes, radioactive decay, and the nucleus.

Have students complete Isotopes of Pennies assessment sheet so that you can assess student understanding of the concepts in this lesson.

In the first part of the assessment, students apply what they have learned to various elements.

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