Question : Which d-block element in the periodic table is represented by the Greek symbol "alpha" and the metallic "rays"?
Option 1: Lanthanum
Option 2: Actinium
Option 3: Rhenium
Option 4: Tungsten
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Correct Answer: Actinium
Solution : The correct option is Actinium .
Actinium is a block element whose name is derived from the Greek 'actinos', meaning a ray. The Greek symbols "alpha" and metallic "rays" are representative of the element as a source of alpha radiation. It is toxic due to its radioactivity. Actinium occurs naturally in uranium ores. For research, it is made by the neutron bombardment of radium-226.
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