Download presentation

Presentation is loading. Please wait.

Published byPoppy Owen Modified over 5 years ago

2
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 PEN of iron– 55 & iron– 56

3
11 Atomic mass: the weighted average mass of ALL the isotopes of that element. This number is located on the bottom of each block on the periodic table Not a whole number Different from the Mass #

4
A piece of carbon will contain both carbon-12 & carbon-14. Carbon-12 is found in 98% of the sample. Carbon-14 is found in 2% of the sample. What is the average atomic mass of carbon?

5
Change percent to decimal Multiply the decimal by the mass # of that isotope Then add the two sums together. Answer must have units 98% =.98 2% =.02 .98 x 12 = 11.76 .02 x 14 = 0.28 11.76 + 0.28 = 12.04 12.04 amu

6
1. 80% 127 I, 17% 126 I, 3% 128 I 2. 50% 197 Au, 50% 198 Au 3. 99% 1 H, 0.8% 2 H, 0.2% 3 H 4. 95% 14 N, 3% 15 N, 2% 16 N 5. Pg. 121 18 – 22

Similar presentations

© 2021 SlidePlayer.com Inc.

All rights reserved.

To make this website work, we log user data and share it with processors. To use this website, you must agree to our Privacy Policy, including cookie policy.

Ads by Google