Question
Which of the following substances is an element?
A. salt
B. protein
C. hydrogen
D. insulin
A. salt
B. protein
C. hydrogen
D. insulin
Answers
GPT-4o mini
C. hydrogen
Hydrogen is an element, while salt (sodium chloride), protein (which is made up of amino acids), and insulin (a specific protein hormone) are all compounds or complex substances made up of multiple elements.
Hydrogen is an element, while salt (sodium chloride), protein (which is made up of amino acids), and insulin (a specific protein hormone) are all compounds or complex substances made up of multiple elements.