Question

what is the correct chronological order of scientists contributing to the modern periodic table?
lavoisier, newlands, moseley, dobereiner, and mendeleev
lavoisier, dobereiner, newlands, mendeleev, and moseley
moseley, mendeleev, newlands, dobereiner, and lavoisier
done
one of the following properties was originally used to arrange elements on the periodic table, but is no longer used to organize the modern version. which property fits this description?
atomic number
atomic mass
chemical properties
done

Explanation:

Antoine - Laurent Lavoisier made early contributions in the 18th - 19th century. Johann Wolfgang Dobereiner proposed the law of triads in the early 19th century. John Newlands put forward the law of octaves in 1864. Dmitri Mendeleev published his periodic table in 1869. Henry Moseley's work on atomic numbers was in the early 20th century. Initially, elements were arranged by atomic mass in the periodic table, but with the discovery of atomic numbers, atomic mass is no longer the primary organizing property.

Answer:

1. B. Lavoisier, Dobereiner, Newlands, Mendeleev, and Moseley
2. B. atomic mass