Presentation is loading. Please wait.

Presentation is loading. Please wait.

Using Isotope Data to Find a Weighted Average.  Each isotope will have two values associated with it.  Mass of Isotope  Percent Abundance (% found.

Published byClifford Simpson Modified over 9 years ago

Similar presentations

Presentation on theme: "Using Isotope Data to Find a Weighted Average.  Each isotope will have two values associated with it.  Mass of Isotope  Percent Abundance (% found."— Presentation transcript:

1 Using Isotope Data to Find a Weighted Average

2  Each isotope will have two values associated with it.  Mass of Isotope  Percent Abundance (% found in nature)  Units for Atomic Mass:  AMU = atomic mass unit  Weighted average

3  Step #1: For each isotope: (contributing mass) Mass of isotope X (% abundance/100)  Step #2: Add products from Step #1

4 Carbon has two naturally occurring isotopes. Carbon-12 has a mass of 12.000-amu with an abundance of 98.890%. Carbon-13 has a mass of 13.003-amu with an abundance of 1.11%. Calculate the average atomic mass of carbon.

5 Isotope% AbundanceMass (amu) Oxygen-1699.75915.995 Oxygen-170.0416.115 Oxygen-180.2117.999

6 Calculate the average atomic mass of copper using the isotope data in the above table. Isotope% AbundanceMass (amu) Copper-6369.2062.93 Copper-6530.8064.93

Download ppt "Using Isotope Data to Find a Weighted Average.  Each isotope will have two values associated with it.  Mass of Isotope  Percent Abundance (% found."

Similar presentations

4.3: HOW ATOMS DIFFER ATOMIC NUMBER

4.3: HOW ATOMS DIFFER ATOMIC NUMBER
Average Atomic Mass & % Abundance

Average Atomic Mass & % Abundance
Periodic table Groups – Columns down Alkali Metals Alkaline Earth Metals Halogens Noble gases Periods – Rows across Lanthanides Actinides Groups – Columns.

Periodic table Groups – Columns down Alkali Metals Alkaline Earth Metals Halogens Noble gases Periods – Rows across Lanthanides Actinides Groups – Columns.
Atomic Mass Standard mass unit is derived from carbon 12 Atomic mass unit – the mass equal to 1/12 the mass of one Carbon 12 atom.

Atomic Mass Standard mass unit is derived from carbon 12 Atomic mass unit – the mass equal to 1/12 the mass of one Carbon 12 atom.
Chapter 11B Notes Determining Isotope Masses. Intro What is the mass of an atom with 6 protons and 6 neutrons? 12 What is the mass of an atom with 6 protons.

Chapter 11B Notes Determining Isotope Masses. Intro What is the mass of an atom with 6 protons and 6 neutrons? 12 What is the mass of an atom with 6 protons.
Average Atomic Mass.

Average Atomic Mass.
1 Average Atomic Mass Chemistry Notes. 2 Relative Atomic Mass  Masses of atoms expressed in grams are very small, for example: One atom of Oxygen-16.

1 Average Atomic Mass Chemistry Notes. 2 Relative Atomic Mass  Masses of atoms expressed in grams are very small, for example: One atom of Oxygen-16.
Average Atomic Mass Due Monday Oct 14, 2013

Average Atomic Mass Due Monday Oct 14, 2013
Average Atomic Mass. Masses of Atoms A scale designed for atoms gives their small atomic masses in atomic mass units (amu) An atom of 12 C was assigned.

Average Atomic Mass. Masses of Atoms A scale designed for atoms gives their small atomic masses in atomic mass units (amu) An atom of 12 C was assigned.
 Each element on the periodic table has an isotope.  What make an element have different isotopes?  There are 2 different isotopes of iron  Find the.

 Each element on the periodic table has an isotope.  What make an element have different isotopes?  There are 2 different isotopes of iron  Find the.
Average Atomic Mass. Average Atomic Mass – the weighted average of the masses of the isotopes of an element Every element is composed of several naturally.

Average Atomic Mass. Average Atomic Mass – the weighted average of the masses of the isotopes of an element Every element is composed of several naturally.
Examples: Average Atomic Mass. Example Chlorine exists as a mixture of 75.770% chlorine-35 and 24.230% chlorine-37. Determine the average atomic mass.

Examples: Average Atomic Mass. Example Chlorine exists as a mixture of % chlorine-35 and % chlorine-37. Determine the average atomic mass.
ISOTOPES and RELATIVE ABUNDANCE What is an isotope? What is relative abundance?

ISOTOPES and RELATIVE ABUNDANCE What is an isotope? What is relative abundance?
Mass Number Atomic Number equals the # of... NUCLEUS ELECTRONS PROTONS NEUTRONS NEGATIVE CHARGE POSITIVE CHARGE NEUTRAL CHARGE ATOM.

Mass Number Atomic Number equals the # of... NUCLEUS ELECTRONS PROTONS NEUTRONS NEGATIVE CHARGE POSITIVE CHARGE NEUTRAL CHARGE ATOM.
Isotopes Atoms of the same element that different mass numbers

Isotopes Atoms of the same element that different mass numbers
Average Atomic Mass The weighted average of the masses of all the naturally occurring isotopes of an element.

Average Atomic Mass The weighted average of the masses of all the naturally occurring isotopes of an element.
Unit 2 Review - Section 1 Atomic Structure and Mass.

Unit 2 Review - Section 1 Atomic Structure and Mass.
Date: Objective Background Lab 8 The Atomic Mass of “Boltium”

Date: Objective Background Lab 8 The Atomic Mass of “Boltium”
Average Atomic Mass.

Average Atomic Mass.
Isotopes  Atoms with the same number of protons but different numbers of neutrons  Ex) Carbon 12 vs. Carbon 14  These atoms have a different mass 

Isotopes  Atoms with the same number of protons but different numbers of neutrons  Ex) Carbon 12 vs. Carbon 14  These atoms have a different mass 

Similar presentations

Ads by Google