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Any material that spontaneously undergoes changes in elemental composition within an observable time is radioactive.

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12y ago

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What is the definition for radio active waves?

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What active galaxy is sending out radio waves?

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Is it possible for the amounts of some elements in earth's crust to decrease or increase?

Yes it would. For instance in the breakdown of radio-active elements.


What is the most reactive group of metals?

The Group (I) , Alkali metals, are the most reactive. In Water : - Lithium ; gently fizzes/ Sodium ; fizzes and spits Potassium ; spits and bangs Rubidium ; bangs nd explodes Caesium ; is Explosive. Francium ; is Radio-Active, so dissolving in water is NOT done. because of the spread of radio-active material.


What elements give off particles?

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What elements are the noble gasses?

Helium, Neon, Argon, Xenon, Krypton and a radio-active one called Radon


What are Elements in the middle block of the periodic table are called?

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Where are the group 1 metals and what are they called on the periodic table?

They are named as Group(I) in the Periodic Table. However, they are also known as the Alkali Metals. They are Lithium, Sodium, Potassium, Rubidium, Caesium, and Francium. Francium is never found in the open lab, as it is radio-active.


Which elements are most like sulfur?

From the Periodic Table, in Group 6. The other elements like sulphur are, Oxygen and selenium. All three are non metals, and have variable oxidation states. The there is the metalloid - Tellurium Finally, two metals, both radio -active, Polonium and Livermorium.


Radio active S block elements?

The radioactive s-block elements are francium and radium. Francium is a highly radioactive alkali metal with a very short half-life, while radium is a radioactive alkaline earth metal known for its radioactivity. Due to their high radioactivity, these elements are not found in nature in significant quantities and must be synthesized in laboratories.


What is meant by the term 'radio active'?

The term radio active came from the dangerous elements like Plutonium, Uranium, Radium and Caesium. These elements produces extreme heat and radioactivity. When exposed to these elements, one may get cancer problems. Pierre and Marie Curie discovered Radium but due to constant exposure to the element, they died of cancer. Plutonium and Uranium are used to produce atomic energy.


What two radio active elements did Hershey and Chanse inject into bacteriophages?

Hershey and Chase used isotopes of sulphur and phosphorus. Please see the link.