Overview
Elements and atoms are fundamental to all living organisms. Atoms, the smallest units of matter, combine to form elements, which are organized in the periodic table. These elements, such as carbon, hydrogen, oxygen, and nitrogen, are essential for life, forming the molecules that make up cells and t...
Key Terms
Example: A hydrogen atom is the simplest atom.
Example: Oxygen is an element essential for respiration.
Example: Water (H2O) is a molecule made of hydrogen and oxygen.
Example: Sodium chloride (table salt) is a compound.
Example: The periodic table helps predict element properties.
Example: The number of protons defines the element.
Related Topics
Key Concepts
AtomsElementsMoleculesBiological Importance