The Organization of the Periodic Table

How are the elements in the periodic table arranged?

• by the number of neutrons

• by the atomic number of an element

• by the atomic mass of an element

The horizontal rows of elements in the periodic table are called

• Families

• Groups

• Periods

• Elements

________ are the COLUMNS on the periodic table and are organized by similar properties.

• Classifications
• Groups
• Periods
• Elements

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Atoms with similar properties are most likely located...

• in the same period.

• in the same group or family.

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Elements in the same period have similar characteristics.

• True
• False

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How did Dmitri predict elements?

• Time traveled

• Predicted the properties by the atomic numbers left

• Guess and checked

• Calculated the atomic mass and properties

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2 rows beneath the main periodic table

• Lanthanide

• Lanthanide and Actinide

• Lanthanide and Hydrogen

• Actinide and Hydrogen

What is the periodic law?

• Elements have numbers

• Elements have specific names

• Elements are organized based on families

• Elements are organized based on atomic masses

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Which of these is a property of metals?

• It's malleable
• It can't conduct electricity
• They are used in food
• It's very brittle

Which of these grouping of elements could have the characteristic of brittle?

• Metal
• Nonmetal

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