BBC
Bbc: Gcse Bitesize: Predicting Chemical Reactions
This lesson focuses on the physical properties of halogens, Group 7 elements on the Periodic Table. It includes the physical properties of the elements, provides a graph showing the melting and boiling points of the halogens, and links...
BBC
Bbc: Gcse Bitesize: What Does the Periodic Table Tell Us About the Elements?
The elements in Group 7 of the Periodic Table are called the halogens. They include chlorine, bromine and iodine. Learn about their properties and uses, then take a quiz.
Khan Academy
Khan Academy: Technetium Decay and Its Cardiac Application
Read a passage about technetium decay and its cardiac application and answer the follow-up questions.