Beryllium atom in 3D
Light, rigid materials. Beryllium is used in specialist lightweight components and X-ray windows. Explore the 3D model, inspect its parts and learn with guided explanations. Free on Atlas.
What you can learn
Light, rigid materials. Beryllium is used in specialist lightweight components and X-ray windows.
Identify beryllium from its proton count.
Count the neutrons in Beryllium-9.
Inspect the occupied electron shells.
Compare the valence shell with a neighbouring element.
Explain what changes when an electron is lost.
Material uses depend on bulk properties. A shell diagram alone cannot predict a material’s strength.
Try an investigation
Identify beryllium from its proton count.
Check your understanding
What identifies an atom as beryllium?
4 protons. Atomic number is proton count. Every beryllium nucleus has 4 protons.
How many neutrons are in Beryllium-9?
5. Neutrons = mass number − atomic number = 9 − 4 = 5. Mass number is not the average atomic weight of natural samples.
How many electrons are in a neutral beryllium atom?
4. A neutral atom balances 4 positive protons with 4 negative electrons.
Which shell count describes neutral beryllium in its ground state?
2, 2. [He] 2s² gives 2, 2 electrons across its occupied shells. Circular paths are only diagram guides.
If this atom loses one electron, what happens to its net charge?
It becomes +1. Losing one negative electron leaves one more proton than electrons. Its 4 protons still identify it as beryllium.
What can this 3D shell model tell you reliably?
The particle counts for the selected neutral isotope. The counts represent a defined isotope and neutral atom. Particle sizes, spacing and circles are simplified teaching symbols.
Sources and model scope
An educational representation. The explorer identifies its data sources, scale choices and simplifications.