Group

Equation

R²

Group 1A

y = 63.055x^−2.737

y = 10.356x^−1.902*

^{* (Excluding H)}

R² = 0.9981

R² = 0.987*

Group 2A

y = 8.4232x^−1.776

R² = 0.9771

Group 3A

y = 6.9729x^−1.867

R² = 0.9878

Group 4A

y = 6.3518x^−1.821

R² = 0.9854

Group 5A

y = 5.4589x^−1.73

R² = 0.9838

Group 6A

y = 4.8691x^−1.669

R² = 0.979

Group 7A

y = 4.1472x^−1.566

R² = 0.9737

Group 8A

y = 3.7873x^{−1.532 (Excluding He)}

y = 16.077x^−2.199

R² = 0.9978

R² = 0.9794**

Group 3B

y = 1.5012x − 1.136

y = −0.1801x + 0.6443 (Has been calculated with 3B) y = −0.1823x + 0.6425 y = −0.1785x + 0.6361

y = −0.1761x + 0.6231

y = −0.1726x + 0.6173

y = −0.1646x + 0.5934

y = −0.159x + 0.5833

y = −0.149x + 0.559

y = −0.1447x + 0.5504

y = −0.1399x + 0.5367

y = −0.1351x + 0.526

y = −0.1346x + 0.5201

y = −0.1318x + 0.5134

y = −0.1236x + 0.4962

y = −0.1224x + 0.4909

R² = 0.9864

Group 4B

y = 1.4459x^−1.247

R² = 0.9819

Group 5B

y = 1.3652x^−1.206

R² = 0.9779

Group 6B

y = 1.3303x^−1.198

R² = 0.9807

Group 7B

y = 1.2625x^−1.161

R² = 0.9779

Group 8B1

y = 1.2306x^−1.148

R² = 0.9819

Group 8B2

y = 1.1743x^−1.122

R² = 0.9776

Group 8B3

y = 1.1689x^−1.136

R² = 0.9832

Group 1B

y = 1.0883x^−1.077

R² = 0.9763

Group 2B

y = 1.0516x^−1.067

R² = 0.9799