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physical object > natural object > particle > element > column grouped element > transition metal > inner transition metal > rare Earth > promethium

promethium
subject			fact

promethium	has image
	is a kind of rare Earth
	is a kind of synthetic element
synthetic element	has lifetime
	has synthesis mechanism
rare Earth	has filling orbital 4f
	has synonym lanthanide
element	is a part of Universe
particle	obeys uncertainty principle
	has frequency inversely proportional to the wavelength
	has wavelength inversely proportional to its momentum
	has charge
	has mass
column grouped element	has group a column number in the table of the elements
physical object	has location or center of gravity
	has angular momentum
	has velocity
	has momentum
	has temperature
	has volume
	has extent
	has material

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