Protactinium (Pa) - 91 on the Periodic Table | Periodic Table

Standard IUPAC: Protactinium • Symbol: Pa • Atomic Mass: 231.03588 u

Quick Factsheet: Protactinium (symbol Pa, atomic number 91) is element 91 on the periodic table of elements. It has a standard atomic weight of 231.03588 u and an electron configuration of [Rn] 7s2 5f2 6d1. On the periodic table, Protactinium is classified in period 7 and group Main.

1. Periodic Table Position of Protactinium (91 on the Periodic Table)

Element Protactinium has atomic number Z = 91, meaning it contains 91 protons in its atomic nucleus and 91 electrons in its neutral state. On the standard periodic table of elements, Protactinium is located in period 7 and group Main.

2. Electron Configuration & Oxidation States (Protactinium Charges & Configuration)

Full Electron Configuration: [Rn] 7s2 5f2 6d1

Common Oxidation States (Charges): 2,3,4,5c

3. Physical Properties & Atomic Mass (Protactinium Atomic Mass)

Element Protactinium has a standard atomic weight of 231.03588 u. Its melting point is 1845. K and boiling point is 4273. K. The Pauling electronegativity value is 1.5.

Comprehensive chemical properties and data for Protactinium (Pa, Z=91).

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4. Related Elements in the Same Chemical Family

Ac (Z=89) Th (Z=90) U (Z=92) Np (Z=93) Pu (Z=94) Am (Z=95)

5. Frequently Asked Questions about Protactinium (FAQ)

What is the chemical symbol and atomic number of Protactinium?

The chemical symbol of Protactinium is Pa and its atomic number is 91.

What is the atomic mass and electron configuration of Protactinium?

Protactinium has a standard atomic mass of 231.03588 u and ground-state electron configuration of [Rn] 7s2 5f2 6d1.

What periodic table group and period does Protactinium belong to?

Protactinium is located in period 7 and group Main on the periodic table of elements.

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