Unit 2 Periodicity Review

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Which were features of Mendeleev's periodic table?

• elements in columns had similar properties

• atomic masses were determined by mass spectrometer

• the arrangement of elements was based on electron configuration

• blank spaces predicted elements yet to be discovered

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Which is the periodic repetition of properties when the elements are arranged by increasing atomic number?

• law of octaves

• octet rule

• periodic law

• aufbau principle

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Which are typically included for each element on the modern periodic table?

• atomic number

• melting point

• atomic mass

• origin of the name

• element symbol

Why were there blank spaces left in Mendeleev's periodic table?                                              

• He didn't know what to put there.
•  Undiscovered elements not yet known.
• Multiple elements could have fit
• He forgot to add the elements in.

Which property did Mendeleev use to order his periodic table?

• Shielding effect
• Eletronegitivity
• Atomic Weight
• Metallic Character

What was Dmitri Mendeleev's greatest contribution to the history of the periodic table?

• He arranged all of the known elements by their atomic number
• He realised that there was a pattern of reactivity which repeated every 8 elements
• He predicted the existence (and properties) of new elements
• He identified the "law of triads" which became the groups

Each vertical column on the periodic table is called a...

• group

• tower

• period

• crew

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The horizontal rows on the periodic table are called

• groups

• families

• periods

• atomic numbers

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In each square of the periodic table, the number at the bottom is the:

• atomic number

• atomic mass

• chemical symbol

• element name

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NGSS.HS-PS1-1

The number at the top of each square on the periodic table is the ...

• atomic number
• atomic mass
• Chemical Symbol
• Element Name

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