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Pa,

symbol for the element protactiniumprotactinium
, radioactive chemical element; symbol Pa; at. no. 91; mass number of most stable isotope 231; m.p. greater than 1,600°C;; b.p. 4,026°C;; sp. gr. 15.37 (calculated); valence +4, +5. Protactinium is a malleable, shiny silver-gray radioactive metal.
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PA

or

p.a.

Abbrev. for position angle.

Pennsylvania State Information

Phone: (717) 787-2121
www.state.pa.us


Area (sq mi):: 46055.24 (land 44816.61; water 1238.63) Population per square mile: 277.30
Population 2005: 12,429,616 State rank: 0 Population change: 2000-20005 1.20%; 1990-2000 3.40% Population 2000: 12,281,054 (White 84.10%; Black or African American 10.00%; Hispanic or Latino 3.20%; Asian 1.80%; Other 2.80%). Foreign born: 4.10%. Median age: 38.00
Income 2000: per capita $20,880; median household $40,106; Population below poverty level: 11.00% Personal per capita income (2000-2003): $29,695-$31,911
Unemployment (2004): 5.40% Unemployment change (from 2000): 1.20% Median travel time to work: 25.20 minutes Working outside county of residence: 27.60%

List of Pennsylvania counties:

  • Adams County
  • Allegheny County
  • Armstrong County
  • Beaver County
  • Bedford County
  • Berks County
  • Blair County
  • Bradford County
  • Bucks County
  • Butler County
  • Cambria County
  • Cameron County
  • Carbon County
  • Centre County
  • Chester County
  • Clarion County
  • Clearfield County
  • Clinton County
  • Columbia County
  • Crawford County
  • Cumberland County
  • Dauphin County
  • Delaware County
  • Elk County
  • Erie County
  • Fayette County
  • Forest County
  • Franklin County
  • Fulton County
  • Greene County
  • Huntingdon County
  • Indiana County
  • Jefferson County
  • Juniata County
  • Lackawanna County
  • Lancaster County
  • Lawrence County
  • Lebanon County
  • Lehigh County
  • Luzerne County
  • Lycoming County
  • McKean County
  • Mercer County
  • Mifflin County
  • Monroe County
  • Montgomery County
  • Montour County
  • Northampton County
  • Northumberland County
  • Perry County
  • Philadelphia County
  • Pike County
  • Potter County
  • Schuylkill County
  • Snyder County
  • Somerset County
  • Sullivan County
  • Susquehanna County
  • Tioga County
  • Union County
  • Venango County
  • Warren County
  • Washington County
  • Wayne County
  • Westmoreland County
  • Wyoming County
  • York County
  • Pennsylvania Parks

    pA

    (electricity)

    Pa

    (mechanics)
    (chemistry)

    Pa

    Symbol for pascal; a unit of pressure.

    PA

    On drawings, abbr. for public address system.

    pascal (Pa)

    The Standard International unit of pressure; 1 pascal is equal to 1 newton per square meter.

    pa

    , pah NZ
    1. a Maori village or settlement
    2. History a Maori defensive position and settlement on a hilltop

    pa

    (networking)
    The country code for Panama.