List of Topics

SfC Home > Physical Science > Chemistry >

 

Mini-Quiz: Chemical Elements

by Ron Kurtus (revised 16 September 2015)

Take this Mini-Quiz to check your understanding of the lesson material.



1. What does the atomic number designate?

An alphabetical ranking

The number of protons in the nucleus

The number of protons and neutrons in the nucleus

2. If the average atomic weight of atomic number 11 (Sodium) is 22.989770, how many neutrons are in its most common isotope?

Round off 22.989770 to get 23 and add 11 to get 34

Round off 22.989770 to get 23 and subtract 11 to get 12

Round off 22.989770 to get 22 and divide by 11 to get 2

3. Why are the atomic weights of the unstable elements whole numbers?

It is just an approximation, because measurements could not be made

They are the few elements with an exact atomic weight

They are so unstable that the decimals simply fell off

If you got all three correct, you are on your way to becoming a Champion in Chemistry. If you had problems, you had better look over the material again.


The solution is elementary


Resources and references

Ron Kurtus' Credentials

Websites

Chemical Elements - Site with details on Periodic Table

Chemistry Resources

Books

Top-rated books on Chemistry

Top-rated books on Physical Science


Questions and comments

Do you have any questions, comments, or opinions on this subject? If so, send an email with your feedback. I will try to get back to you as soon as possible.


Share

Click on a button to bookmark or share this page through Twitter, Facebook, email, or other services:

 

Students and researchers

The Web address of this page is:
www.school-for-champions.com/chemistry/
mini-quiz_elements.htm

Please include it as a link on your website or as a reference in your report, document, or thesis.

Copyright © Restrictions


Where are you now?

School for Champions

Chemistry topics

Mini-Quiz: Chemical Elements




Chemistry topics

Basics

Ingredients

Tools

Recipe

Mixing things together

Cooking

Graded tests

Also see



Let's make the world a better place

Be the best that you can be.

Use your knowledge and skills to help others succeed.

Don't be wasteful; protect our environment.

You CAN influence the world.





Live Your Life as a Champion:

Take care of your health

Seek knowledge and gain skills

Do excellent work

Be valuable to others

Have utmost character

Be a Champion!



The School for Champions helps you become the type of person who can be called a Champion.