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Radium

Ra

INTRODUCTION

Radium from Latin word for radius, 'ray', is a chemically reactive, silvery white, radioactive metallic element. Radium is only handled or used in its salt form and never in its metallic state due to its consequence.

Radium is formed by the radioactive disintegration of uranium and is consequently found in all uranium ores. Radium is present in uranium ore to the extent of 1 part of radium to 3 million of uranium.

BASIC INFORMATIONS

  • Atomic Number
  • 88
  • Atomic Mass
  • 226
  • Atomic radius
  • N/A
  • Ionization energy
  • 509
  • Electronic config
  • 2,8,18,32,18,8,2
  • Principal Valency
  • +2
  • Density g/cm³
  • 5.5
  • Melting point °C
  • 700
  • Boiling point °C
  • 1737
  • Type of Element
  • Metal
  • Electronegativity
  • 0.9
  • Element Category
  • Alkaline Earth Metal
  • Appearance
  • Silvery white solid
  • Block
  • s-block
  • Period
  • 7
  • Group
  • 2
  • No of Isotopes
  • 35
  • Occurrence
  • Radioactive
  • Abundance in ppm
  • Minute amount
  • Year of Discovery
  • 1898

EXTRACTION

It is obtain by the introduction of barium compound and then precipitation action

OXIDATION STATES

+2 (Strongly acidic)

MAJOR SOURCE

Uranium ores

EXAMPLES OF COMPOUND PRESENT

Radium sulfate, Radium chloride, Radium bromide

ECONOMIC IMPORTANCE

* Radium which gives off x-rays at from one to two million volts is no more effective than x-ray, but a good deal more convenient because it can be inserted into the

tumor itself, and thus give off radiation directly to the cells of the neoplasm.

* Mixture of radium salt with zinc sulfide, the substance is caused to luminesce by the bombardment of the alpha rays emitted by the radium.

* Sometime minute amounts of radium is used in the manufacture of substances or materials that glow at night.

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