Periodic Table Discrete Chemistry

How are elements organized in the periodic table ?

• Alphabetically

• Based on physical and chemical properties

• Increasing number of electrons

• Most reactive to least reactive

Most elements on the periodic table are classified as ____________.

• Gases

• Metalloids

• Metals

• Nonmetals

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Groups on the periodic table are arranged...

• Vertically

• Horizontally

• Diagonally from bottom right corner

• Diagonally from top right corner

Which accurately describes nonmetals?

• Poor conductors of electricity

• Often used in computer parts

• Both malleable and ductile

• Both dull and brittle

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What is the chemical symbol for Sodium?

• S

• So

• Na

• Ca

How many neutrons does Chlorine have?

• 17

• 36

• 35

• 18

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How many periods are there in the periodic table?

• 7

• 9

• 10

• 18

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Each horizontal row on the periodic table is called a what?

• Group

• Row

• Period

• Family

Who arranged the periodic table of elements by the atomic mass (or mass number)?

• Democritus

• John Dalton

• Henry Moseley

• Dmitri Mendeleev

Identify the unknown atom.

• Flourine

• Beryllium

• Boron

• Helium

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