Curated OER
2000 U.S. National Chemistry Olympiad National Exam - Part I
The National Chemistry Olympiad exams are comprehensive tests covering an entire year of chemistry concepts. You can use them as practice for competing in the challenge, or simply as a review, or as an actual final exam for your general...
Curated OER
Regents High School Examination PHYSICAL SETTING CHEMISTRY 2006
The 2006 version of the Regents High School Exam is just as thorough as the rest of them! Assess chemistry learners on an entire year's curriculum when they take this thirteen page test.
Curated OER
Radioactivity
In this radioactivity worksheet, students write the mass number and atomic number for the missing element in the reactions. Students identify the isotope that is more stable and determine the half-life of the isotope. This worksheet has...
CK-12 Foundation
Ck 12: Nuclear Radiation
[Free Registration/Login may be required to access all resource tools.] In this module, students will understand how radioactivity involves a change in the nucleus of a radioisotope and calculate the conversion of mass to energy...
Estrella Mountain Community College
Online Biology Book: Chemistry I: Atoms and Molecules
In this online biology textbook, learn about atoms and molecules as they relate to life. Find out about topics such as electrons and energy, chemical bonding, and chemical reactions.
CK-12 Foundation
Ck 12: Physical Science: Radioactive Half Life
[Free Registration/Login may be required to access all resource tools.] The half-life of a radioisotope, rates of radioactive decay and variation in half-lives in different radioisotopes.
CK-12 Foundation
Ck 12: Physical Science: Radioisotopes
[Free Registration/Login may be required to access all resource tools.] What a radioisotope is and why they have unstable nuclei. Elements in which all of the isotopes are radioactive.
CK-12 Foundation
Ck 12: Physical Science: Isotopes
[Free Registration/Login may be required to access all resource tools.] Definition of isotopes, how they are named and their stability.