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- 1. Multiple ChoiceWhat was Dmitri Mendeleev's greatest contribution to the history of the periodic table?He arranged all of the known elements by their atomic numberHe realised that there was a pattern of reactivity which repeated every 8 elementsHe predicted the existence (and properties) of new elementsHe identified the "law of triads" which became the groups
- 2. Multiple ChoiceMendeleev classified elements based on not only atomic mass but what else?reactivityboiling pointsphysical properties onlychemical & physical properties
- 3. Multiple ChoiceWhy 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 fitHe forgot to add the elements in.
- 4. Multiple ChoiceWhy did scientists need/want to organize the elements?Scientists like things organizedmake it easier to understand the elementshave one list of the known elements.none of the above
- 5. Multiple ChoiceMoseley discovered that the ________ was the most fundamental property needed for organization.atomic massmass numberatomic numbernumber of protons
- 6. Multiple Choice
I am a British scientist who came up with today's periodic table of elements that is based on increasing order of proton number. Who am i?
Henry G.J Mosely
J.J Thomson
Erwin Schrodinger
John Dalton
- 7. Multiple ChoiceUsed the law of triads to make a list of elementsMendeleevDobereinerMosely
- 8. Multiple Choice_______________ developed the first periodic table and arranged the elements in order of increasing atomic mass.Stevie WonderSasha VujacicDmitri MendeleevJames Mosely
- 9. Multiple Choice
Mendeleev arranged the elements by their ________________
alphabetical
density
melting point
atomic mass
- 10. Multiple Choice
What do atoms of the same periodic group have in common?
They have the same atomic number.
They have the same chemical symbols.
The have similar chemical properties.
They have the same atomic mass.
- 11. Multiple Choice
element Triads have similar properties; quantitative properties of middle element are the average of the other two in the triad; had lots of exceptions
Meyer
Mosley
Mendeleev
Dobereiner
- 12. Multiple Choice
first to organize the elements by atomic mass; noticed patterns in every 8th element; law of octaves; left no gaps for future discovery; law of octaves did not work for larger elements
Dobereiner
Mendeleev
Seaborg
Newlands
- 13. Multiple Choice
Plotted the graph of atomic volume against atomic mass of elements to arrange the elements
Mendeleev
Dobereiner
Meyer
Mosley
- 14. Multiple Choice
The first scientist that classified the elements.
Antoine Lavosier
John Newlands
Lothar Meyer
Henry Mosely
- 15. Multiple Choice
New elements discovered are names after the ...................... of scientist.
location
name
birth place
nick name
- Answer choicesTagsAnswer choicesTags