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Calcium atom & ion lab

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

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Scientific learning path

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

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 energy589.8 kJ mol⁻¹
Covalent radius176 pm
Electronegativity1 Pauling

Description of this simulation

Calcium is neutral here: 20 protons are balanced by 20 electrons across shells 2, 8, 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?

Ca

Calcium

Z = 20
Protons
20
Electrons
20
Shells
2 · 8 · 8 · 2
Configuration
[Ar] 4s2
Common oxidation states
2
Phase near room conditions
solid

What this model shows — and what it simplifies

Educational Model

The nuclear charge stays fixed at 20 protons, which is what defines Calcium.

Where do we see this in real life?

The electron count and measured properties of Calcium 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
School
Reviewer
Not publicly assigned

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