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physical object > natural object > collection of particles > phase of matter > solid > metal > actinide

actinide
subject			fact

actinide	has atomic number 89 to 103
	has filling orbital 5f
	has definition Element with atomic number between 89 (Actinium) and 103
	is a kind of inner transition metal
	is a kind of metal
	is a kind of inner transition metal
element	is a part of Universe
	has synonym atom
column grouped element	has group a column number in the table of the elements
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

Kinds of actinide :

• actinium (6 kinds, 128 facts) (Ac, Ac, ²D_3/2 in ground state) - soft, silvery-white, radioactive metal which glows in the dark
• protactinium (4 facts)
• thorium (5 facts)
• transuranium element (31 kinds, 200 facts) - A synthetic element with atomic number greater than 92 (uranium)
• uranium (5 facts)

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