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It is here a great confusion !
The rhenium diboride (ReB2) is supposed to be the hardest material today - but this assumption also is not generally accepted/confirmed.
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∙ 14y ago
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What Solid element or compound is found in the earth?
Diamond is the hardest materail in the world
Is radium found usually in a compound or in pure form?
Radium is usually found in compounds. Since it is an alkaline earth metal it is to reactive to exist in its elemental states in most environments, and especially in Earth's oxidizing atmosphere.
Is radium a metalloid?
No, radium is an alkaline earth metal .
Is radium a metal or a nonmetal?
Radium is an alkaline earth metal.
What state is radium?
Radium is a solid alkaline earth metal.
Which family is the element Radium in?
Radium is in the alkaline earth metals.
What is the abundance of radium in the earth's crust?
The abundance of radium in the earth crust is 9.10-10 mg/kg.
Hardest thing on Earth?
diamond is the hardest thing on earth
What is the hardest mater on Earth?
The hardest matter on earth is Diamond.
Is quarts the hardest mineral on earth?
Diamond is the hardest mineral on earth.
Is Radium a metal nonmetal or a metalloid?
Radon is a non-metal, an element. It belongs to group 18 and period 6 on the periodic table.
What is radium at room temperature?
Radium is a solid alkaline earth metal at room temperature.
