How did Moseley establish a more accurate periodic table?
A. by arranging the elements according to atomic mass instead of atomic number
B. by arranging the elements according to atomic number instead of atomic mass
C. by arranging the elements into horizontal periods
D. by arranging the elements into vertical groups

Henry Moseley improved the periodic table by arranging elements according to their atomic number instead of atomic mass, resolving inconsistencies in Mendeleev's arrangement. His X-ray experiments confirmed that atomic number correlates with the properties of elements. This foundational change led to the modern periodic table that we use today. ;

Answered by GinnyAnswer | 2025-07-06

Henry Moseley established a more accurate periodic table by arranging elements according to atomic number instead of atomic mass, resolving placement inconsistencies. His X-ray experiments revealed the uniqueness of atomic numbers, allowing for a clearer understanding of elemental properties. This change formed the basis for the modern periodic table we use today.
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Answered by Anonymous | 2025-07-07