12 Questions
What are the four elements that contribute to about 96% of the body's weight?
Oxygen, Carbon, Hydrogen, Nitrogen
Which category do trace elements like Iron and Zinc fall into?
Nutritionally Essential Trace Elements
What is the definition of a trace element in biochemistry?
A dietary mineral required in very small quantities
Which category do non-essential trace elements like Aluminum and Lead belong to?
Non-essential Trace Elements
What is the main characteristic of nutritionally essential trace elements?
They are required in very small quantities
What term is used to refer to a matter that is a combination of two or more elements?
Compound
What is the central part of an atom called?
Atomic nucleus
How are the masses of atomic particles typically measured?
Atomic mass unit
What holds the structure of an atom together?
Attraction between protons and electrons
What makes up the majority of an atom's volume?
Electron cloud
Which particles in an atom are responsible for the positive charge?
Protons
In what forms can matter be grouped?
Element and compound
Test your knowledge on the chemical basis of life by understanding the structure of an atom. Learn about the central nucleus, protons, neutrons, and electrons that make up an atom.
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