Conceptual
Periodic Trends
Visualise electronegativity, atomic radius & ionisation energy
Understand how element properties change across periods and down groups. Each cell shows electronegativity (Pauling), atomic radius in picometres, and first ionisation energy in eV. Trend arrows guide your eye across and down the table.
- Electronegativity (Pauling scale)
- Atomic radius (pm)
- First ionisation energy (eV)
- Trend direction arrows
Best for: Concept learners, Teachers & lecturers, Chemistry revision
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Pauling Scale
Electronegativity Heatmap
Pauling scale gradient — low (blue) to high (red)
Electronegativity determines how strongly an atom attracts electrons in a bond. This heatmap colours every element on the Pauling scale from low (blue, e.g. Cs ≈ 0.79) to high (red, e.g. F = 3.98). The numeric value is printed inside each cell.
- Colour gradient: blue (low EN) → red (high EN)
- Pauling scale value per cell
- F (3.98) anchors the high end
Best for: Bond polarity, Chemical bonding, Organic chemistry
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Periodicity
Ionization Energy Heatmap
First ionization energy in eV
A distinct yellow-to-purple gradient shows how much energy it takes to remove an electron, from caesium at the low end to helium at the high end.
- First ionization energy per cell
- Linear colour scale
- Numeric values in eV
- All 118 positions
Best for: Periodic trends, Reactivity, Bonding theory
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Periodicity
Atomic Radius Heatmap
Calculated atomic size in picometres
A linear colour gradient maps atomic size from tiny helium to large francium, making the across-period and down-group trends visible at a glance.
- Calculated radius in pm
- Linear colour gradient
- Unavailable values uncoloured
Best for: Periodic trends, Bonding, Ionic-size comparisons
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Heatmap
Density Heatmap
Gradient from lightest to heaviest elements
A logarithmic colour gradient keeps both very light gases and dense metals visually distinct, from the lightest gases (blue) to osmium and iridium (red). The numeric density in g/cm³ remains printed inside every cell.
- Logarithmic gradient: low → blue, high → red
- Density value in g/cm³ per cell
- Osmium (22.6 g/cm³) anchors the scale
Best for: Materials science, Physical chemistry, Lab reference
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Bonding
Valence Electrons
Colour-coded by outer electron count — essential for bonding
Each element is colour-coded by its number of valence electrons (1–8), making it immediately clear which elements can form the same types of bonds. Transition metals, lanthanides, and actinides are marked as variable.
- 9-colour legend (1 ve through 8 ve + variable)
- Transition metals & f-block labelled 'var'
- Atomic number + symbol in every cell
Best for: Bonding theory, Lewis structures, Introductory chemistry
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