# Suggested Metric Units

## Xenna

• Value: 1027 = Octillion = 10009
• Greek for "nine"
• Abbreviation: X
• Uses
• Volume of some galaxies is in the Xm3 range
• 1 Xennasecond = 32 Quintillion years
• Jupiter’s mass ≈ 1.90164Xg
• In E=mc2, objects with a mass of 1.1127*1010kg is 1XN

## Weka

• Value: 1030 = Nonillion = 100010
• Greek for "ten"
• Abbreviation: W
• Uses
• 1Ws = 32 Sextillion years
• Volume of some galaxies is in the Wm3 range
• Some stars have a mass of 1Wg
• In E=mc2, objects with a mass of 1.1127*1013kg is 1WN

## Vendeka

• Value: 1033 = Decillion = 100011
• Greek for "eleven"
• Abbreviation: V
• Uses
• Sun’s mass = 1.99Vg
• 1Vs = 32 Septillion years
• Volume of some galaxy clusters is in the Vm3 range
• In E=mc2, objects with a mass of 1.1127*1016kg is 1VN

## Udeka

• Value: 1036 = Duodecillion = 100012
• Greek for "twelve"
• Abbreviation: U
• Uses
• Mass of some stars is in the Ug range
• 1Us = 32 Octillion years
• Volume of some galaxy clusters is in the Um3 range
• Objects in the kilogram range have a mass of 10Uev

## Xenno

• Value: 10-27 = Octillionth = 1000-9
• Greek for "0.000001"
• Abbreviation: x
• Uses
• Nucleon Mass ≈ 1.67xg
• 1 Dalton = 1.6605xg
• Some molecules weigh in the xennogram range
• Electron mass = 0.09109xg
• Carbon atom’s mass ≈ 20xg

## Weko

• Value: 10-30 = Nonillionth = 1000-10
• Greek for "0.0000001"
• Abbreviation: w
• Uses
• Gamma-ray photon mass = 2.2wg
• Volume of subatomic particles
• Mass of a moving beta-ray ≈ 1wg

## Vendeko

• Value: 10-33 = Decillionth = 1000-11
• Greek for "0.00000001"
• Abbreviation: v
• Uses
• Planck’s Constant = 0.663vW
• UV photon mass = 9vg
• X-ray photon mass = 20vg

## Udeko

• Value: 10-36 = Duodecillionth = 1000-12
• Greek for "0.000000001"
• Abbreviation: u
• Uses
• Plank's Constant = 663uv
• Mass of a visible light photon = 5.4ug (violet)
• Mass of an orange light photon = 3.68ug
• Mass of an infrared photon = 200ug