#!/usr/bin/env python3
# -*- coding: utf-8 -*-

"""
Library references :
  * https://pypi.org/project/mendeleev/
  * https://mendeleev.readthedocs.io/en/stable/
  * https://github.com/lmmentel/mendeleev
"""
from mendeleev import element
import matplotlib.pyplot as plt

x, y = range(1,108), [element(i).ionenergies[1] for i in range(1,108)]
for i in range(1,108):
    print(x[i-1], y[i-1])

plt.figure()
plt.plot(x, y)
plt.savefig("ionenergies.png")
plt.show()