Zn + Pb(NO3)2 –> Pb + Zn(NO3)2, etc.
Want to see something metal? What could be more brutally metal than “lead trees”? Yes, trees of actual lead. A forest of them. And they are chillingly majestic. Granted, they’re tiny and in a solution, but I’m going to overlook that fact.
Study Chemistry with Study Putty
Metal salts in aqueous solution of sodium silicate.
Atomic Orbital Mnemonics
How does one remember SPDFGHIK…? Remembering the S through K orbitals is the trick. After K, it goes alphabetical. (But skipping S and P, because they’ve already been done.) My search for atomic orbital mnemonic devices only turned up one that had sufficient character to stick those eight seemingly arbitrary letters in my mind.
The Standard Mnemonic
The one I found was pretty good, though:
Sober Physicists Don’t Find Giraffes Hiding In Kitchens.
by Greg Robson, via Wikimedia. Creative Commons Attribution-ShareAlike.
Copyright Law and Images for Educational Use
Click any image in this post to see its source and open license information.
It’s not difficult to find images for your classroom and teaching materials while honoring copyright law. There are a number of ways to find free or open-license images on the Internet. While there is such a thing as the fair use of copyrighted images for educational use, this use is fairly restrictive and requires your time and effort to ensure you’ve complied. Unless a specific image you need is a copyrighted resource, your time may serve you better to search for free or properly licensed images. Here are three safe and easy ways to find an image you can be certain you have license to use. Continue reading
How to Name Polyatomic Ions
Here are some simple rules for naming polyatomic ions.
Polyatomic ions with more oxygen atoms will end in -ate, and those with fewer oxygen atoms will end in -ite. When there are more than two polyatomic ions composed of the same elements, the prefix hypo- indicates the least number of oxygen atoms, and the prefix per- will indicate the most oxygen per ion.
Look at the paradigm for chlorine oxyanions below. Continue reading
LaTeX Square Roots
LaTeX square roots are done with the command
10 LaTeX Font Sizes
These are the commands for changing LaTeX font size (technically, the size of an entire figure). Continue reading
If you’re a math or science educator, using LaTeX to format math online can be easy with a list of LaTeX commands for reference. In this post, you’ll find tips on using LaTeX for fractions. Continue reading
What is Oppia? Find out about Oppia.org in my previous post, Oppia: Opportunity for Progressive Learning or Open-Content Muddle?
Creating the Dimensional Analysis Exploration
As I left off in my last post, I tried out Oppia.org by creating an exploration called “Dimensional Analysis for Chemistry.” In short, while the creation process is a little laborious depending on the complexity of the exploration, I was rather pleased with the content creation tools. In particular, I was impressed by the powerful options for setting the feedback rules for user responses. In my opinion, Oppia may have a place in a teacher’s tool belt–or it can just become a creative hobby. Here’s the good and the…almost good, to consider when you look at Oppia.org. Continue reading
How Do You Memorize the Polyatomic Ions’ Charges?
New in our growing list of Study Putty learning games is a game for memorizing the charges of the polyatomic ions. You can test yourself here (match chemical formulas to charges) and here (match names to charges), or visit the Study Putty homepage to see all our topics.
Click the screenshot to play the game!
And if you’re just looking for a quick reference, here’s a list of the polyatomic ions, including the charge. Continue reading