Search results
atom, Smallest unit into which matter can be divided and still retain the characteristic properties of an element. The word derives from the Greek atomos (“indivisible”), and the atom was believed to be indivisible until the early 20th century, when electrons and the nucleus were discovered.
Introduction to the atom. Learn how atoms are made up of protons, neutrons, and electrons. Elements are defined by the atomic number, the number of protons in the nucleus. The mass of an atom is determined by the total number of protons and neutrons. Created by Sal Khan.
May 18, 2021 · Figure 2.2.1 2.2. 1: The Structure of the Atom. Atoms have protons and neutrons in the center, making the nucleus, while the electrons orbit the nucleus. The modern atomic theory states that atoms of one element are the same, while atoms of different elements are different.
An atom is the smallest unit of matter that retains all of the chemical properties of an element. Introduction. What is your body made of? Your first thought might be that it is made up of different organs—such as your heart, lungs, and stomach—that work together to keep your body going.
Jan 24, 2024 · Atoms are the tiny building blocks from which everything around us is constructed. It's amazing to think you can make anything out of atoms, from a snake to an ocean liner—but it's absolutely true! Let's take a closer look. Artwork: From the hair on your head to the t-shirt on your back, everything in the world is made of atoms.
Learn. Quantum Wavefunction. The quantum mechanical model of the atom. Quantum numbers. Quantum numbers for the first four shells. Shells, subshells, and orbitals. The periodic table, electron shells, and orbitals.
atomic physics, the scientific study of the structure of the atom, its energy states, and its interactions with other particles and with electric and magnetic fields. Atomic physics has proved to be a spectacularly successful application of quantum mechanics, which is one of the cornerstones of modern physics.
