Learn about the halogen elements. Get the list of halogens and learn about their properties. Halogen Elements – List and Facts This entry was posted on October 10, 2020 by Anne Helmenstine (updated on June 10, 2025)
Get the phase change definition in chemistry and print a phase change diagram. Phase Changes of Matter (Phase Transitions) This entry was posted on October 8, 2020 by Anne Helmenstine (updated on February 14, 2026)
Get the homogeneous mixture definition and see solid, liquid, and gas homogeneous liquid examples. What Is a Homogeneous Mixture? Definition and Examples This entry was posted on October 7, 2020 by Anne Helmenstine (updated on August 9, 2026)
Get the atomic number definition. See examples of the atomic number and learn how it differs from mass number. What Is an Atomic Number? Definition and Examples This entry was posted on October 6, 2020 by Anne Helmenstine (updated on July 7, 2026)
See how to preserve a carved pumpkin. Get science-based tips to make a pumpkin last longer and learn which methods don't work. How to Preserve a Carved Pumpkin This entry was posted on October 5, 2020 by Anne Helmenstine (updated on October 19, 2025)
Get uranium facts. Learn about the properties, uses, and sources of element atomic number 92. Uranium Facts – Atomic Number 92 Element Symbol U This entry was posted on October 4, 2020 by Anne Helmenstine (updated on October 18, 2025)
Get the definition of an emulsion in chemistry and cooking. See examples of emulsions. What Is an Emulsion? Definition and Examples This entry was posted on October 3, 2020 by Anne Helmenstine (updated on September 9, 2025)
Get fun and interesting krypton facts. Krypton is atomic number 36 with element symbol Kr. Krypton Facts – Atomic Number 36 Element Symbol Kr This entry was posted on October 1, 2020 by Anne Helmenstine (updated on September 25, 2021)