Dr. Helmenstine's 2004 Chemistry Articles
01/11/04 - Types of Crystals - Shapes & Structures
Let's take a look at the two main ways to categorize crystal types. I've described the major crystal structures (e.g., triclinic, hexagonal) and how crystals are classified by their properties (e.g., ionic, covalent) and provided links so that you can see examples of crystal types and learn more about crystallography.
01/08/04 - High School Courses Needed for College Chemistry Major
Are you a middle school or high school student contemplating a college major in chemistry? Here's a look at some of the courses that can help you with your goal!
01/04/04 - Searching for Extraterrestial Life
There's some serious chemistry involved in the search for life on other planets (or gas clouds or asteroids or comets). However, other disciplines come into play as well, such as robotics, aeronautics, biology, geology, and economics. Here's an overview of how we search for ETs.
01/01/04 - Unit of Measurement Hangman Game
This is a challenging hangman game where the words are all units of measurement. I've provided links to tables that list units to help you think of words or so you can find out more about the units.
