Chemistry
Use this atomic number lookup to calculate find an element by atomic number and view its symbol, mass, group, period, and category.
Calculator
Element result
Potassium
Atomic number
19
Atomic mass
39.0983 u
Group
1
Period
4
Block
s-block
Phase at room temp
solid
Potassium is a soft alkali metal and an essential electrolyte in living organisms.
Electron configuration
[Ar] 4s1
Electronegativity
0.82
Density
0.862 g/cm3
Melting point
336.53 K
Boiling point
1032 K
Discovered by
Humphry Davy
Year discovered
1807
Common uses
Fertilizers, Glass, Soaps, Biological electrolytes
Celsius
25 C
Fahrenheit
77 F
Kelvin
298.15 K
At this temperature, Potassium is expected to be solid.
Melting point: 336.53 K
Boiling point: 1032 K
Physical state estimates are based on standard pressure and may change under different pressure conditions.
Sign in to save this calculation and access it later.
Trust note
Use this result as a practical estimate. Real-world conditions, local rules, measurement tolerance, and changing inputs can affect the final outcome.
Atomic number lookup = exact element match
This calculator applies the formula Atomic number lookup = exact element match. Enter each value with the matching unit, and AZCalculate updates the result instantly.
Assumptions
Avoid mistakes
Follow the reasoning, not only the final number.
Enter the known values in the calculator fields.
Starting with clearly defined values and units prevents the most common calculation errors.
Keep the units consistent with the labels shown beside each input.
This step transforms the known values into the form required by the formula.
Apply the formula: Atomic number lookup = exact element match.
This step transforms the known values into the form required by the formula.
Review the primary result and supporting values.
Compare the result with your real-world goal, such as find elements from atomic numbers.
Worked example
Atomic number: 26
Calculator guide
Find an element by atomic number and view its symbol, mass, group, period, and category. This page includes an interactive calculator, concise formula notes, worked examples, FAQs, related calculators, and practical guidance you can revisit whenever needed.
References
We work hard to keep every calculator accurate and useful. If you notice a calculation error, missing option, or unclear explanation, please let us know so we can review and correct it promptly.
Usage information loads after the calculator is ready.
FAQ
It uses Atomic number lookup = exact element match and calculates the result from the values you enter.
Yes. AZCalculate calculator pages include copy, share, and print actions.
Use it as an estimate and compare it with the formula, assumptions, and examples shown on the page.
Real-world inputs can include local rules, changing rates, measurement tolerances, and conditions outside the core formula.
Enter the known values requested by the calculator. Use the unit selectors where available and make sure the values describe the same scenario.
The calculator follows the formula shown on this page. Accuracy depends on the values, units, assumptions, and rounding used in your scenario.
Yes. Use the country, currency, and unit-system controls. Supported calculators apply those preferences and shared links preserve them.
Yes. You can share through WhatsApp, Facebook, X, or LinkedIn, copy a link, create a QR code, and print or save a formatted report as PDF.
Related tools
Continue with closely related tools selected from the same subject and matching calculation needs.
Search elements by name, symbol, atomic number, or approximate atomic mass, then view atomic data and temperature state estimates.
Find an element from its name, symbol, atomic number, or approximate atomic mass.
Find full element names and atomic data from element symbols such as K, Fe, or Au.
Look up atomic weight and nearest matching elements by approximate atomic mass.
Calculate approximate molecular weight from element masses and atom counts.
Calculate moles from mass and molar mass.
Estimate whether an element is solid, liquid, or gas at a selected temperature using melting and boiling points.
Convert moles to particles using Avogadro's number.
