Definition

A chemical element that is radioactive and is found in uranium ores. It is used to produce alpha rays and has properties similar to another element called lanthanum. The most stable form of this element has a long half-life.

Example

Actinium is used in radiation therapy for cancer treatment.

Conversation

Have you ever heard of actinium?

Yeah, it's that radioactive element, right?

Exactly! It's found in uranium ores and has some interesting properties.

I read that it can be used as a source of alpha rays, which is pretty cool!

Synonyms & Antonyms

Root Explanation

Actinium is derived from the Greek word "aktinos" (meaning ray or beam). The name reflects the element's radioactivity, as it emits rays.

Memory Tip

Think of 'ray' or 'beam' in Greek ('aktinos') to remember that actinium is associated with emitting rays due to its radioactivity.

Visually Confused Words