Terms
Terms of service
Effective November 13, 2026
These terms are the agreement between you and Stone Giant Studio LLC, a Texas company, which runs Periodic Mole, the chemistry study site at periodicmole.com. When these terms say “we,” they mean Stone Giant Studio LLC. By using the site, you agree to them. If you’re under 18, please read them with a parent or guardian. We say what we collect and how we use it in our privacy policy.
Accounts
- An account is for one person. Keep your password and sign-in codes to yourself, and don’t share the account.
- Give us an email address that is yours, or, for a student’s account a parent sets up, the student’s.
- You’re responsible for what happens under your account. If you think someone else is using it, email support@periodicmole.com.
- We give teachers free accounts at our discretion, and we may withdraw them.
Purchases and refunds
You pay once, through Stripe, for full access for a set period, one year or two, at the price shown at checkout. There’s no subscription, and we don’t renew anything automatically. When the period ends, we lock the paid parts again, and the free parts stay free.
If it isn’t working out, email support@periodicmole.com within 30 days of your purchase and we refund it in full. We don’t ask why.
Students under 18
A student under 18 needs a parent’s or guardian’s permission, or their school’s, to buy access. Periodic Mole is made for high school students and isn’t meant for children under 13.
Fair use
When you use Periodic Mole, please don’t:
- cheat in matches or contests, for example with bots, scripts or extra accounts;
- harass other players or disrupt their matches;
- scrape the site or copy it in bulk with automated tools (search engines may index our public pages);
- try to get around sign-in, payment or security checks, or to break the site;
- resell or share paid access.
If you break these rules, we may suspend or close your account. You can stop using Periodic Mole at any time.
Our content
The games, review decks, lessons, artwork and sound are ours, and we reserve all rights in them. Some reference pages carry an open license for teachers and students; we list those pages, with the license terms, on our licenses page.
Accuracy
We work to get the chemistry right, but we can make mistakes. Use it as a study aid alongside your teacher and your course materials. We don’t promise any grade or exam score. If you find an error, tell us at support@periodicmole.com and we’ll check it and correct it.
Limits on our liability
We provide Periodic Mole as it is and as available, without warranties of any kind, to the fullest extent permitted by law. To the same extent, we aren’t liable for indirect or consequential losses, and our total liability to you for any claim is no more than what you paid us in the 12 months before it.
Changes to these terms
When we change these terms, we post the new version on this page with a new effective date. If we make a change that matters to account holders, we’ll email them first. If you keep using the site after that, you accept the new terms.
Governing law
You and we agree to Texas law for these terms, and to bring any dispute about them in the state or federal courts in Dallas County, Texas.
Contact us
Stone Giant Studio LLC runs this site. Write to support@periodicmole.com, or by mail to Periodic Mole · 16801 Addison Road, Addison, TX 75001.