Argon is a noble gas. At S.T.P. it is a colourless odourless gas.
Xenon is not visible so in gaseous form,it is odorless and colorless.
It cannot be seen with visible light. but it is believed to be spherical.
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Argon is a noble gas. At S.T.P. it is a colourless odourless gas.
It is a colourless gas.
when in its normal state,which is at room temperature, it is a solid.
it looks like gas,
solid
picture
Plutonium has a metallic appearance.
The appearance of francium is not known.
It is a bluish color in a cube like shape.
In its' elemental state potassium is a soft silvery metal.
It is a shiny silver colored metal
Americium has a metallic, silvery appearance.