Protactinium (9007 bytes)
5: | colspan="2" align="center" | [[thorium]] - '''protactinium''' - [[uranium]]
16: | protactinium, Pa, 91
147: '''Protactinium''' is a [[chemical element]] in the [[periodic ta...
150: Protactinium is a silver [[metal]]lic element that belongs to ...
153: ...ity and toxicity, there are currently no uses for protactinium outside of basic scientific research.

Unquadunium (203 bytes)
2: '''Unquadunium''' (Eka-protactinium) is the [[IUPAC]] name of the element 141, which ...

Unbitrium (1754 bytes)
9: | rowspan="3" valign="center" | [[Protactinium|Pa]]<br>
38: '''Unbitrium''' (eka-protactinium) is the [[IUPAC]] name of the element 123, which ...

Rare earth (809 bytes)
4: ...ium]], [[lutetium]], [[actinium]], [[thorium]], [[protactinium]], [[uranium]], [[neptunium]], [[plutonium]], [[a...

Group element (829 bytes)
3: ...[[Lanthanides]]; and [[Actinium]], [[Thorium]], [[Protactinium]], [[Uranium]], [[Neptunium]], [[Plutonium]], [[A...

Pa (1224 bytes)
13: * [[protactinium]] ('''Pa'''), [[symbol for the chemical element]]

Actinide (1537 bytes)
11: | 91 || [[Protactinium]] || Pa

Kasimir Fajans (1534 bytes)
7: ...tto H. Gohring]] that he identified the element [[Protactinium]].

List of elements by density (3537 bytes)
349: | [[Protactinium]]

Atomic electron configuration table (25186 bytes)
105: <tr><td>91</td><td bgcolor="#FF99CC">[[Protactinium]]</td><td bgcolor="#DDDDDD">2</td><td bgcolor="#D...

1913 in science (2028 bytes)
15: * [[Protactinium]] was first identified by [[Kasimir Fajans]] and ...

Period 7 element (4619 bytes)
69: <td bgcolor="#ff99cc">91<br>[[Protactinium|Pa]]</td>

Valency (8286 bytes)
101: <tr><td>91</td><td></td><td>[[Protactinium]]</td><td></td><td>4, 5</td></tr>

91 (number) (2939 bytes)
24: *The [[atomic number]] of [[protactinium]], an actinide.

The Elements (song) (2858 bytes)
9: :And [[gold]], [[protactinium]] and [[indium]] and [[gallium]],

Periodic table (electron configurations) (19730 bytes)
189: ...dth="5%" align="center" bgcolor="#ff99cc">91<br>[[Protactinium|Pa]]<br> _{<i>2<br>2<br>1</i>}</td>

List of elements by boiling point (3557 bytes)
88: <tr><td>[[Protactinium]]<td>Pa<td>4030

List of elements by atomic number (6919 bytes)
93: <tr><td>91</td><td>[[protactinium]]</td><td>Pa</td></tr>

Periodic table (big) (12932 bytes)
183: ... style="background: rgb(208, 208, 255);"><small>[[protactinium]]</small><br>91<br>Pa</td>

Periodic table (block) (9723 bytes)
173: <td bgcolor="#66ffcc">91<br>[[Protactinium|Pa]]</td>

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