Gilbert N. Lewis was an American physical chemist born on October 23, 1875, and he passed away on March 23, 1946. He is best known for his contributions to the understanding of chemical bonding and molecular structure. Lewis introduced the concept of the Lewis dot structure, which visually represents the valence electrons of atoms in a molecule. In addition to his work on chemical bonding, Lewis also proposed the Lewis acid-base theory, which describes how acids and bases interact. His research laid the groundwork for modern chemistry, influencing fields such as organic chemistry and inorganic chemistry. Lewis's legacy continues to impact scientific education and research today.