Organizing the Periodic Table

One of the advantages of classifying elements systematically in the Periodic Table of Elements is

• Making it easier for the scientists to choose atoms

• Knowing the number of neutrons in an element

• Predicting the chemical characteristics of an element

• Identifying the scientist who discovered the element

What property did Mendeleev use to arrange the elements?

• alphabetical

• density

• melting point

• atomic weight

Mendeleev started a new row whenever the properties of the elements _?_.

• changed

• reversed

• were no longer evident

• repeated

The months of the year are __?__ because they repeat in the same order every 12 months. So are the hours of the day.

• periodic

• group

• period

• halogens

Mendeleev placed elements with similar properties in the same _?_.

• row

• column

• table

• pile

A property that was unknown to Mendeleev was _?_.

• atomic number

• atomic weight

• density

• melting point

A significant accomplishment of Mendeleev's organization method is that he successfully used it to _?_.

• classify the noble gases

• measure the atomic masses of elements

• discover new elements

• predict the properties of undiscovered elements

Moseley re-ordered Mendeleev's Periodic Table using _?_.

• atomic weight

• atomic mass

• valence number

• atomic number

The periodic table got its name from the _?_.

• repeating similarities in the properties of elements

• punctuation after chemical symbols

• shape of the table

• last name of the founder

The Moseley 'rearrangement' _?_.

• did not change the order of a majority of elements

• eliminated the exceptions that didn't work with Mendeleev's plan

• used the number of protons to identify elements

• All of these