Cobalt vs Protactinium

Side-by-side comparison of element properties

Co

Cobalt

Atomic Number 27

Transition Metal

Pa

Protactinium

Atomic Number 91

Actinide

Bond Analysis

Electronegativity Difference

0.38

Predicted Bond Type

nonpolar covalent

Relationship

Different regions

Property Comparison

Property	Cobalt	Protactinium
Atomic Mass	58.9330 u	231.0400 u
Electronegativity	1.88	1.50

Cobalt

Block: d-block
Period: 4
Group: 9
Phase at STP: Solid
Config: [Ar] 3d7 4s2

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Protactinium

Block: f-block
Period: 7
Phase at STP: Solid
Config: [Rn] 5f2 6d1 7s2

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Ratios

Mass Ratio (Co/Pa)

0.255