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What is an atom? It is the smallest particle of an element, and everything is made up of atoms. They consist of three basic particles: protons, electrons, and neutrons. The scientific community has experienced significant breakthroughs which have contributed to the understanding of atoms. Other topics covered include atomic number, atomic mass, Bohr model, electron cloud, and isotope.
(Source: DCMP)
Figure 2.10 (OpenStax, Biology 2e) caption: A double bond joins the oxygen atoms in an O2 molecule.
(Source: OpenStax)
It's called a theory, but if we have never seen an atom, how did anyone ever come up with an idea that is so central to science. Shows how all the pieces of the puzzle have come together at the same time, explaining the structure of the atom and the periodic table.
Chemistry is the science of interacting particles and the various states of matter. Developing a better understanding of the atomic model through experiments with gases, scientists discovered the Ideal Gas Law, developed phase diagrams, and learned about the properties of supercritical fluids. Today's chemists are exploring new ways to control the interactions of atoms, with the goal of making better hydrogen-powered cars and new technologies for the long-term, underground storage of carbon dioxide to reduce greenhouse warming. Part of the series Chemistry: Challenges And Solutions.
As scientists discovered more and more chemical elements, they began developing systems to organize the elements by their chemical properties, leading to the modern periodic table. Through its organization, the periodic table makes clear the underlying chemical and physical trends among the elements. The periodic table is being continually updated even today as scientists strive to create new elements in laboratories. Part of the series Chemistry: Challenges And Solutions.
Using light as a probe, scientists found innovative ways to make inferences about the inner structure of the atom. In this unit, scientists discuss the change from believing the atom was a single indivisible particle to later understanding the atom is composed of subatomic parts. This new picture of matter lead to the development of the quantum model of the atom, as well as ways to identify traces of chemical elements, whether on earth, in the sun, or in a distant galaxy. Part of the series Chemistry: Challenges And Solutions.
Molecules form when individual atoms create bonds by sharing electrons. Understanding how atoms combine to make molecules allows scientists to predict many of the physical and chemical properties of substances. Since the outermost eight electrons are key to forming compounds, this unit shows how the Octet Rule provides a basis for predicting how atoms may gain, lose, or share electrons to fill the slots in their outer shells. A fundamental understanding of how electrons form bonds leads to the three-dimensional shapes of molecules and has implications in all aspects of chemistry. Part of the series Chemistry: Challenges And Solutions.
Smart Puppy and his friends use peanuts to understand the size of atoms. Part of the “Smart Puppy! and Friends” series.
Students learn how to differentiate mixtures, solutions, elements, and compounds. Additional concepts and terminology discussed include: element, pure substance, properties, atoms, molecule, compounds, types of mixtures, suspension, colloid, and alloy.
Biology is the study of life. It encompasses the cellular basis of living things, the energy that underlies the activities of life, and the genetic basis for inheritance in organisms. Topics covered include the smallest components of living things: atoms, molecules, organelles, and cells. Part of the "Biology" series.
Figure 2.2 (OpenStax, Biology 2e) caption: Elements, such as helium, depicted here, are made up of atoms. Atoms are made up of protons and neutrons located within the nucleus, with electrons in orbitals surrounding the nucleus.
Part of the "Chemistry in Action" series. Describes and illustrates the process of chemical bonding through live action footage and animations. Provides an overview of the role atomic structure plays in the process of bonding. Provides examples of how chemical bonding, including ionic bonds, covalent bonds, and metallic bonds, affects the characteristics of matter. Introduces the following terminology: element, atomic structure, energy level, valence electrons, ionic bonds, crystal lattice, covalent bond, and metallic bond.
Figure 2.9 (OpenStax, Biology 2e) caption: Two or more atoms may bond with each other to form a molecule. When two hydrogens and an oxygen share electrons via covalent bonds it forms a water molecule.
Part of a series that features a wide variety of video footage, photographs, diagrams and colorful, animated graphics and labels. Begins with a simple definition of the term and concludes with a critical thinking question. For this particular video, students will focus on the term translational motion. Part of the Science Video Vocab Series.
Graphene could make it possible for electricity to move effortlessly through computer chips, thereby allowing computer systems to run faster than ever before. Savings in both heat and energy costs could have graphene replacing silicon as the basis of computer chip construction. Part of the Fast Draw Series.
Part of the "Chemistry in Action" series. Demonstrates how chemical compounds are placed into groups so that they may be studied easier. Explores acids and bases, emphasizing their nature and common everyday uses. Discusses carbon compounds, and introduces the following terminology: acid, base, pH, salt, carbon, organic, and hydrocarbon.
Introduces the concept that everything is made of matter, and examines the three states of matter. Defines and examines a range of solids, liquids, and gases. Uses graphics to show the effects of heat on atoms and molecules in solids. Summarizes each segment.
Petunia and Pinky introduce viewers to bacteria in this episode. They discuss bacterial structure, reproduction, and how not all bacteria are bad. Other topics covered include endospores, plasmids, and bacteria transformation. Part of "The Amoeba Sisters" series.
The formation of molecular bonds is an essential part of keeping matter together. The sharing of charges between atoms helps them become more stable. Other topics covered include sharing electrons, bonding tendencies, isomers, VSEPR theory, and molecular geometry. Part of the "Chemistry" series.
Grab the Chemistry to play and explore concepts related to friction. Note when using the VoiceOver screen reader with this simulation it is easy to activate VoiceOver's Quick Nav mode while moving the Chemistry book. For the best experience, however, we recommend keeping Quick Nav off.
(Source: PhET Interactive Simulations)
Showing collections 1 to 3 of 3
A collection of Chemistry related resources
A collection containing 67 resources, curated by Benetech
Biology related concepts
A collection containing 59 resources, curated by Benetech
A collection of simulations from PhET.
A collection containing 15 resources, curated by Charles LaPierre
