Question
What is the major difference between the periodic table created by Dmitri Mendeleev and the one created by Henry Moseley?
Moseley arranged the elements in order of increasing atomic mass.
Moseley ignored variations resulting from isotopes.
Moseley arranged the elements in order of increasing atomic number.
Moseley divided the elements into four categories.
Moseley arranged the elements in order of increasing atomic mass.
Moseley ignored variations resulting from isotopes.
Moseley arranged the elements in order of increasing atomic number.
Moseley divided the elements into four categories.
Answers
GPT-4o mini
The major difference between the periodic table created by Dmitri Mendeleev and the one created by Henry Moseley is that **Moseley arranged the elements in order of increasing atomic number**.
Mendeleev initially organized the periodic table by increasing atomic mass, which led to some inconsistencies. Moseley's work established that the atomic number, which is the number of protons in an atom's nucleus, is a more fundamental property for organizing the elements, correcting some of Mendeleev's inaccuracies and leading to the modern periodic table based on atomic numbers.
Mendeleev initially organized the periodic table by increasing atomic mass, which led to some inconsistencies. Moseley's work established that the atomic number, which is the number of protons in an atom's nucleus, is a more fundamental property for organizing the elements, correcting some of Mendeleev's inaccuracies and leading to the modern periodic table based on atomic numbers.