PyRank
lmmentel

mendeleev

A python package for accessing various properties of elements, ions and isotopes in the periodic table of elements.
PyPI GitHub
Downloads
Day
6.8K
Week
38.6K
Month
209.8K
Stars
289
Forks
50
Issues
2
Version
1.1.0

Package Insights

What's this?
Score breakdown - each component scores 0-100, weighted by percentage
Maintenance
50
Popularity
51
Adoption
53
Community
30
How the maintenance status was determined
Last commit
181 days ago
Monthly downloads
209,822
Active
Activity within 30 days
Stable
Activity within 31-180 days
• Minimal
Activity within 181-365 days, or no activity data
At Risk
No activity for > 365 days, but > 10,000 monthly downloads
Archived
Repository flagged as archived on GitHub
How the popularity category was determined
Monthly downloads
209,822
Stars
289
Stars per 1k downloads
1.38
Industry Standard
> 10,000,000 monthly downloads
Hidden Gem
< 0.5 stars per 1k downloads and > 100,000 monthly downloads
Community Favorite
> 5 stars per 1k downloads
• Rising Star
Balanced ratio of stars to downloads
Unknown
Fewer than 1,000 monthly downloads, or no star data
How download momentum is calculated
Week daily avg
5,516
Month daily avg
6,994
Momentum
-21.1%
((week_daily_avg - month_daily_avg) / month_daily_avg) * 100
Python version support tiers
requires_python
<3.14,>=3.9
Cutting Edge
Minimum supported version is 3.12 or newer
• Modern
Minimum supported version is 3.9, 3.10, or 3.11
Legacy
Supports 3.8 or older (or Python 2)
Unknown
No requires_python specified or unparseable
License categories
License
MIT
• Permissive
MIT, Apache, BSD, ISC, Unlicense, CC0, etc.
Copyleft
GPL, LGPL, AGPL, MPL, EPL, etc.
Proprietary
Commercial, all rights reserved, custom EULAs
Unknown
No license specified, or none of the above match
How the release cadence was determined
Last release
346 days ago
Total releases
52
Releases/year
4.8
Rapid
Last release within 365 days and > 12 releases/year
• Regular
Last release within 365 days
Slow
Last release 366-730 days ago
Stalled
Last release > 730 days ago, or no releases
Unknown
No usable release date available
How contributor risk was determined
Contributors
9
Monthly downloads
209,822
High Load
≤ 2 contributors and ≥ 50,000 monthly downloads
Moderate Load
< 10 contributors and ≥ 500,000 monthly downloads
Low Load
< 25 contributors and ≥ 5,000,000 monthly downloads, or sole maintainer with ≥ 10,000 monthly downloads
• Balanced
Enough contributors for the package's popularity
Unknown
No contributor data available
Engagement
52
 
Issue Burden
6.9
per 1k stars
Discussions
10.4
per 1k stars
Fork Ratio
18.0%
contrib / forks
Stale Release
164d
 
PR Velocity
Quiet
 

Weekly Downloads

GitHub Stars

Not all downloads include detailed metadata. Breakdowns reflect the subset that does.

Downloads by OS

Linux 3.1K
macOS 125
Windows 48

Python Versions

3.12
84.0% 2.7K
3.11
6.3% 205
3.10
5.0% 163
3.13
3.6% 115
3.9
1.1% 35

Top Countries

1. US US
2.9K
2. SG SG
171
3. FR FR
82
4. BE BE
57
5. NL NL
36
6. RU RU
32
7. DE DE
24
8. CN CN
18
9. CA CA
14
10. IE IE
12

Package Information

License
MIT
First Release
July 10, 2015
Last Release
11 months ago
Last Commit
6 months ago
Latest Version
1.1.0
Total Releases
52
Contributors
9
Open PRs
3
Archived
No
Author
Lukasz Mentel
Python Versions
3 3.8 3.9 3.10 3.11 3.12 3.13
Wheels
py2 py3
Keywords
periodic table chemistry elements science
Tracking Since
January 6, 2026
Data Updated
May 17, 2026
Data Freshness
Fresh

Links