Radium element (Ra) is in group 2 and period 7 of a periodic table. Radium is in the s-block and it is classified as an alkaline earth metal on the periodic table.
There is a lot more information related to radium which is mentioned in the Information Table given below.
So let’s dive right into it!
Table of contents
- Radium element (Information Table)
- Radium element in Periodic table
- Facts about Radium
- Properties of Radium
- Uses of Radium
Radium Element (Information Table)
The important data related to radium element is given in the table below.
|Appearance of radium||Silvery white metallic|
|Atomic number of radium||88|
|Symbol of radium||Ra|
|Atomic mass of radium (most stable isotope)||226 u|
|Protons, Neutrons & Electrons in radium||Protons: 88, Neutrons: 138, Electrons: 88|
|State of radium (at STP)||Solid|
|Group number of radium in periodic table||2|
|Period number of radium in periodic table||7|
|Block of radium in periodic table||s-block|
|Category of radium||Alkaline earth metals|
|Bohr model or Electrons per shell or Electrons arrangement in radium||2, 8, 18, 32, 18, 8, 2|
|Electron configuration of radium||[Rn] 7s2|
|Orbital diagram of radium|
|Valence electrons in radium||2|
|Electronegativity of radium (on pauling scale)||0.9|
|Atomic radius of radium (van der Waals radius)||283 picometers|
|Density of radium||5 g/cm3|
|1st ionization energy of radium||5.27 eV|
|Main isotope of radium||226Ra|
|Melting point of radium||973 K or 700 °C or 1292 °F|
|Boiling point of radium||2010 K or 1737 °C or 3159 °F|
|Crystal structure of radium||Body Centered Cubic (BCC)|
|Discovery of radium||By Pierre Curie and Marie Curie (in 1898)|
Also see: Interactive Periodic Table (It has rotating bohr models as well as many other details of all the 118 elements in a single periodic table).
Radium element in Periodic table
The Radium element (Ra) has the atomic number 88 and is located in group 2 and period 7. Radium is in solid state at STP and it is classified as an alkaline earth metal on the periodic table.
Click on above elements in the periodic table to see their information.
Facts about radium
Here are a few interesting facts about radium element.
- Pierre Curie and Marie Curie discovered the radium element in the year 1898.
- Radium was given its name from the Latin word “radius”, meaning “ray”.
- Radium is the heaviest alkaline earth metal on the periodic table.
- The earth’s crust has radium element in the concentration of around 1 part per trillion by weight, which is very very less.
- Radium is generally obtained from the radioactive decay of uranium.
Properties of radium
Here is a list of some physical properties and chemical properties of radium.
Physical properties of radium
- Radium has a silvery white appearance.
- Radium has many isotopes and all these isotopes are radioactive in nature. Out of these radioactive isotopes, the most abundant is 226Ra.
- The melting point and boiling point of radium is 973 K and 2010 K respectively.
- The density of radium is 5 g/cm3 and its atomic mass is 226 amu.
- Radium has a BCC crystal structure.
Chemical properties of radium
- Radium reacts with the atmospheric nitrogen and a radium nitride layer is formed on it. Due to this reaction, its surface becomes dark.
- Radium also reacts with HCl and forms radium chloride.
- Radium reacts with water and forms radium hydroxide.
Uses of radium
Radium has no uses nowadays because of its radioactive nature. But the compound of radium (radium bromide) was used in devices like wrist watches, clocks, etc that can glow in the dark.
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