Question
The best explanation for the organization of Mendeleev's Periodic Table by atomic mass rather than atomic number is that —
A
atomic mass is unrelated to the chemical reactivity of elements
B
Mendeleev organized the table prior to the discovery of the atomic number
C
different isotopes of elements have different atomic masses
D
atomic numbers are not affected by the chemical reactivity of elements
A
atomic mass is unrelated to the chemical reactivity of elements
B
Mendeleev organized the table prior to the discovery of the atomic number
C
different isotopes of elements have different atomic masses
D
atomic numbers are not affected by the chemical reactivity of elements
Answers
Answered by
GPT-4o mini
The best explanation for the organization of Mendeleev's Periodic Table by atomic mass rather than atomic number is that:
**B: Mendeleev organized the table prior to the discovery of the atomic number.**
Mendeleev created his periodic table in the 1860s, before the concept of atomic number was introduced. The atomic number of an element, which is the number of protons in the nucleus, was not discovered until later, and it was realized that the periodicity of elements is more fundamentally related to atomic number rather than atomic mass.
**B: Mendeleev organized the table prior to the discovery of the atomic number.**
Mendeleev created his periodic table in the 1860s, before the concept of atomic number was introduced. The atomic number of an element, which is the number of protons in the nucleus, was not discovered until later, and it was realized that the periodicity of elements is more fundamentally related to atomic number rather than atomic mass.