fix: add missing elements 104-118 (Rf~Og) to periodic_table.json

[SchrodingersCattt]

The ELEMENTS list in periodic_table.py already contains all 118 element symbols, but periodic_table.json only had entries for elements 1-103 (H~Lr). This mismatch causes KeyError when dpdata.System() is constructed with a type_map that includes elements beyond Lr, and subsequently to_lammps_lmp() is called. The _get_lammps_masses() safety check passes (all names in ELEMENTS) but Element() lookup fails because _pdt dict lacks the entry.

Added elements: Rf(104), Db(105), Sg(106), Bh(107), Hs(108), Mt(109), Ds(110), Rg(111), Cn(112), Nh(113), Fl(114), Mc(115), Lv(116), Ts(117), Og(118). Mass numbers from most stable isotopes.

Summary by CodeRabbit

• New Features
  • Expanded the periodic table data to include elements 104–118, completing the later portion of the table.
  • Added the missing entry closure before the new elements to ensure the data is properly formatted.

[codspeed-hq]

Merging this PR will improve performance by 23.16%

⚠️ Unknown Walltime execution environment detected

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⚠️ Different runtime environments detected

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⚡ 2 improved benchmarks

Performance Changes

	Mode	Benchmark	BASE	HEAD	Efficiency
⚡	WallTime	test_cli	372.1 ms	296.2 ms	+25.64%
⚡	WallTime	test_import	11.3 ms	9.4 ms	+20.72%

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_{Comparing SchrodingersCattt:fix/add-missing-elements-104-118 (2953526) with master (5de0229)}

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 86.87%. Comparing base (8b6a0a7) to head (2953526).
⚠️ Report is 69 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1009      +/-   ##
==========================================
+ Coverage   86.06%   86.87%   +0.81%     
==========================================
  Files          83       89       +6     
  Lines        7886     8268     +382     
==========================================
+ Hits         6787     7183     +396     
+ Misses       1099     1085      -14     

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[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro

Run ID: 65f48075-2e44-4416-884d-630a59b38b61

📥 Commits

Reviewing files that changed from the base of the PR and between 5de0229 and 2953526.

📒 Files selected for processing (1)

• dpdata/periodic_table.json

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📝 Walkthrough

Walkthrough

This PR adds JSON entries for elements with atomic numbers 104 through 118 (Rf through Og) to the periodic table data file, including a fix to properly close the preceding Lr entry.

Changes

Periodic Table Data

Layer / File(s)	Summary
Add missing element entries dpdata/periodic_table.json	Closes the preceding Lr object and appends entries for elements Rf through Og (atomic numbers 104-118), each with name, atomic_no, X, atomic_mass, radius, and calculated_radius fields.

Estimated code review effort: 1 (Trivial) | ~5 minutes

Possibly related issues

• [Code scan] Periodic table list and JSON data are inconsistent for elements 104-118 #990: This issue highlights the same missing/inconsistent periodic table entries for elements 104–118 that this PR adds.

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title accurately summarizes the main change: adding missing periodic table elements 104–118 to periodic_table.json.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

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