#1: What was the key characteristic by which Dmitri Mendeleev arranged his periodic table?
Aincreasing atomic number
Belectron configuration
Cdecreasing atomic number
Dincreasing atomic mass
**my answer: D. increasing atomic mass
is that right?
Aincreasing atomic number
Belectron configuration
Cdecreasing atomic number
Dincreasing atomic mass
is that right?