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physical object > natural object > particle > element > column grouped element > group IV element

group IV element
subject			fact

group IV element	has group 14
	is a kind of column grouped element
element	is a part of Universe
	has synonym atom
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 group IV element :

• carbon (5 kinds, 158 facts) (C, ³P₀ in ground state) - pure forms occur as graphite, diamond and buckminsterfullerene C₆₀
• germanium (7 facts)
• lead (6 facts)
• silicon (5 kinds, 138 facts) (Si, ³P₀ in ground state) - ultrapure crystals of silicon have a blue-grey metallic sheen
• tin (5 facts)

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