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Neptunium atom & ion lab

Change the electron count of Neptunium and inspect its charge, shells and reviewed atomic properties.

UndergraduateLive

Scientific learning path

  1. 01UnderstandLive
  2. 02ExploreLive
  3. 03ExperimentLive
  4. 04ObserveLive
  5. 05ExplainLive
  6. 06ApplyLive
  7. 07TestLive
Explanation mode
Np

Core label represents the fixed nuclear charge; individual neutrons are not inferred from standard atomic weight.

Reviewed atomic properties

Unavailable measurements remain explicitly unavailable.

First ionization energy604.5 kJ mol⁻¹
Covalent radius190 pm
Electronegativity1.36 Pauling

Mass shown is for Np-237, the longest-lived isotope.

Description of this simulation

Neptunium is neutral here: 93 protons are balanced by 93 electrons across shells 2, 8, 18, 32, 23, 8, 2.

Quick test · 3 questions
1. Which statement is evidence from this simulation?
2. How should you test the effect of one control?
3. Why read the model notes?

Np

Neptunium

Z = 93
Protons
93
Electrons
93
Shells
2 · 8 · 18 · 32 · 23 · 8 · 2
Configuration
[Rn] 5f4 6d1 7s2
Common oxidation states
3, 4, 5, 6
Phase near room conditions
solid

What this model shows — and what it simplifies

Educational Model

The nuclear charge stays fixed at 93 protons, which is what defines Neptunium.

Where do we see this in real life?

The electron count and measured properties of Neptunium help determine how it bonds, reacts and is identified in chemical materials.

Explain this result

Scientific review record

Building
Module version
v1 bundled
Published
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Last reviewed
Not yet verified
Academic level
Undergraduate
Reviewer
Not publicly assigned

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