How do I find the mass but in grams of a proton

Chemistry
Tutor: None Selected Time limit: 1 Day

The question on my homework was "Neon has 3 isotopes with the masses of 20 21 and 22. What is the mass, in grams of a proton?" My teacher never went over this in class and the the way the textbook tries to explain it is terrible and I'm just really confused.

Oct 21st, 2015

Thank you for the opportunity to help you with your question!

Ne – 20, Ne – 21 and Ne – 22
in percentage is - Ne -20 = 90.92% , Ne – 21 = 0.26% and Ne – 22 = 8.82 %.

So, if the percentage of the isotopes is known, the average atomic mass of an element can be calculated.

To calculate the average atomic mass of an isotope, the percentage of all isotopes are taken, and divided by the sum of masses of both isotopes.

Example: Calculate the atomic mass of chlorine from the following data: 
Cl : 37 = 24.6 % , Cl : 35 = 75.4 %.Average atomic mass of chlorine = 75.4×35+24.6×3775.4+24.6 = 35.492.

Thus, the average atomic mass of chlorine from this data is 35.492 amu.

Please let me know if you need any clarification. I'm always happy to answer your questions.
Oct 21st, 2015

FOR NEON

The average atomic mass of neon is the weighted average of the mass of the isotopes and equal to 20*0.9092 + 21*0.0025 + 22*0.0883 = 20.10

The average atomic mass of neon is 20.10 amu


Oct 21st, 2015

Did you know? You can earn $20 for every friend you invite to Studypool!
Click here to
Refer a Friend
...
Oct 21st, 2015
...
Oct 21st, 2015
Dec 8th, 2016
check_circle
Mark as Final Answer
check_circle
Unmark as Final Answer
check_circle
Final Answer

Secure Information

Content will be erased after question is completed.

check_circle
Final Answer