Dmitri Mendeleev

Who predicted new elements for the gaps in the periodic table?

• Henry Moseley

• Lothar Meyer

• Dmitri Mendeleev

• Antione Laviosier

Who invented the Periodic Table?

• Mendeleev

• Bohr

• Lewis

• Democritus

Mendeleev's genius was his ability to

• predict elements that were not discovered yet

• organize elements by their mass

• had an element named after himself

• organize elements by properties

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who discovered the first scientific and systematic periodic table

• Henry Mosley

• Dmitri Mendeleev

• John Dalton

• sir Isaac Newton

How did Mendeleev arrange the elements?

• alphabetical 

• density

• melting point

• atomic mass

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Dimitri found that there was a pattern of properties that repeated every ____ elements.

• 2

• 4

• 5

• 7

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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

Mendeleev classified elements based on not only atomic mass but what else?

• reactivity

• boiling points

• physical properties only 

• chemical & physical properties

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.

How did Dmitri predict elements?

• Time traveled

• Predicted the properties by the atomic numbers left

• Guess and checked

• Calculated the atomic mass and properties