Radioactive Elements

noun a highly radioactive metallic element found in small amounts in uranium ores, used in the treatment of cancer and in luminous paints

• The discovery of radium by Marie Curie was a groundbreaking achievement in the field of chemistry.
• Did you know radium was used in glow-in-the-dark paint back in the day?
• That party was lit, they must have added some radium to the drinks!
• Her smile was so bright and infectious, it was like she was emitting radium.

noun a hypothetical chemical element with the symbol Uut and atomic number 113

• Ununtrium is a synthetic element with the atomic number 113.
• I read an article about ununtrium being discovered in a laboratory.
• Have you heard about that new element, ununtrium?
• The discovery of ununtrium opened up new possibilities in the field of chemistry.

noun a radioactive isotope of hydrogen with two neutrons and one proton in its nucleus

• Tritium is a radioactive isotope of hydrogen with a nucleus containing two neutrons and one proton.
• Scientists use tritium in various research experiments to study nuclear reactions.
• I heard tritium is used in glow-in-the-dark keychains.
• The tritium of innovation is what drives progress in technology.

noun a series of chemically similar metallic elements with atomic numbers ranging from 89 to 103, found in the actinide series of the periodic table

• Actinides are a series of chemical elements in the periodic table that are radioactive.
• I learned about actinides in my chemistry class, they're pretty interesting.
• Actinides are like the rockstars of the periodic table, always causing a stir.
• The actinides are like the rebels of the periodic table, breaking all the rules with their radioactive properties.

noun a series of chemical elements that includes actinium and all the elements with atomic numbers from 89 to 103

• The actinide series is a group of elements in the periodic table that includes actinium, thorium, uranium, and other radioactive elements.
• The actinide series is all those super radioactive elements you don't want to mess with.
• The actinide series is like the bad boys of the periodic table, always causing trouble.
• The actinide series is like the rock stars of the periodic table, with their wild and unpredictable behavior.

noun a radioactive metallic chemical element with symbol Ac and atomic number 89

• Actinium is a radioactive element with the symbol Ac and atomic number 89.
• I heard actinium is a really rare element.
• Yo, have you ever seen actinium on the periodic table?
• Her passion for chemistry was like actinium - rare and powerful.

noun a radioactive gas that is a decay product of actinium

• The researchers studied the actinium emanation as part of their experiment on radioactive decay.
• I heard they're looking into that actinium emanation thing for their project.
• Did you catch the latest scoop on actinium emanation? It's pretty wild.
• Her anger was like an actinium emanation, spreading rapidly and uncontrollably.

noun A series of radioactive elements that starts with actinium and ends with lead-206, including actinium, thorium, protactinium, uranium, and various isotopes of these elements.

• The actinium series is a radioactive decay chain that starts with the element actinium-227.
• Did you know about the actinium series and how it decays over time?
• Yo, the actinium series is like a chain reaction of radioactive elements.
• The actinium series can be compared to a domino effect, with each element decaying into the next.

noun a radioactive metallic element that is a member of the actinide series, used in nuclear reactors and bombs

• Actinouranium is a radioactive element with atomic number 92.
• Have you heard about actinouranium? It's a really cool radioactive element.
• I wouldn't mess with actinouranium if I were you, it's pretty dangerous stuff.
• Her words were like actinouranium, causing a reaction wherever they landed.