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

group VI element (chalcogen)
subject			fact

group VI element	has group 16
	has synonym chalcogen
	is a kind of column grouped 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

Kinds of group VI element :

• oxygen (5 kinds, 125 facts) (O, ³P₂ in ground state) - colourless, odourless gas (O₂) which is very reactive
• polonium (3 facts)
• selenium (7 facts)
• sulfur (7 kinds, 150 facts) (S, ³P₂ in ground state) - the α-S₈ orthorhombic form of sulfur is yellow
• tellurium (3 facts)

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