Answer:
B) law of octaves
Explanation:
In 1864, the English chemist John Alexander Reina Newlands informed the Royal College of Chemistry his observation that by ordering the elements in increasing order of their atomic weights (regardless of hydrogen), the eighth element from any another had properties very similar to the first. On that date, noble gases were not yet discovered.
Like many of his contemporaries, Newlands first used the terms equivalente equivalent weight ’and‘ atomic weight ’without distinction in meaning leading to error.
Newlands ordered the 62 elements known to date according to their increasing atomic weights, and noted that this arrangement also placed the properties of the elements in an order, at least partial. By arranging the elements in vertical columns of seven, those that were similar tended to remain in the same horizontal row. Thus, potassium was close to sodium, very similar to him; Selenium was in the same line as sulfur, very similar; calcium close to magnesium, and so on.
This fact, Newlands called the Octave Law.
