Advertisement
Grab your lab coat. Let's get started
Welcome!
Welcome!
Create an account below to get 6 C&EN articles per month, receive newsletters and more - all free.
It seems this is your first time logging in online. Please enter the following information to continue.
As an ACS member you automatically get access to this site. All we need is few more details to create your reading experience.
Not you? Sign in with a different account.
Not you? Sign in with a different account.
ERROR 1
ERROR 1
ERROR 2
ERROR 2
ERROR 2
ERROR 2
ERROR 2
Password and Confirm password must match.
If you have an ACS member number, please enter it here so we can link this account to your membership. (optional)
ERROR 2
ACS values your privacy. By submitting your information, you are gaining access to C&EN and subscribing to our weekly newsletter. We use the information you provide to make your reading experience better, and we will never sell your data to third party members.
Quiz: The elements essential to human life
Test your knowledge of which elements humans can’t live without
by Andy Brunning
April 25, 2019
Before you take our quiz on the essential elements for humans, make sure you check out our Periodic Graphic for some helpful hints.
Which of these elements makes up the greatest percentage of the average human body by mass?
Which of the following elements is not found in any of the 20 essential amino acids that our bodies use to make proteins?
Which of the following elements has key roles in fluid balance and normal nerve and muscle function?
Which of the following elements does not have an important role in our immune system?
Which of the following elements is found in our blood and helps carry oxygen from the lungs to our bodies’ cells?
Which of the following metals is found in vitamin B-12, which is essential for making red blood cells?
Which of the following is an effect of manganese deficiency in the body?
Chemical & Engineering News
ISSN 0009-2347
Copyright © 2025 American Chemical Society
The power is now in your (nitrile gloved) hands
Sign up for a free account to get more articles. Or choose the ACS option that’s right for you.
Already have an ACS ID? Log in
