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physical object > natural object > particle > element > column grouped element > alkali metal > francium

francium
subject			fact

francium	has image
	is a kind of alkali metal
alkali metal	has group 1
	reacts with water vigorously
	has hardness soft
	has appearancee silvery except for francium
	has synonym group I element
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
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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