WorksheetsPeriodic Table History and Structure
Total questions: 10
Worksheet time: 8mins
Name
Class
Date
1.
What was Dmitri Mendeleev's greatest contribution to the history of the periodic table?
a)
He arranged all of the known elements by their atomic number
b)
He realised that there was a pattern of reactivity which repeated every 8 elements
c)
He predicted the existence (and properties) of new elements
d)
He identified the "law of triads" which became the groups
2.
Which of these was not proposed by John Dalton in 1805?
a)
All matter is made of atoms
b)
Atoms are made of protons, neutrons and electrons
c)
During chemical reactions, atoms rearrange themselves
d)
The atoms of a particular element are all identical
3.
Who arranged the first periodic table.
a)
Mosely
b)
Einstein
c)
Mendeleev
d)
Bohr
4.
Mendeleev classified elements based on not only atomic mass but what else?
a)
reactivity
b)
boiling points
c)
physical properties only
d)
chemical & physical properties
5.
Why were there blank spaces left in Mendeleev's periodic table?
a)
He didn't know what to put there.
b)
Undiscovered elements not yet known.
c)
Multiple elements could have fit
d)
He forgot to add the elements in.
6.
How many elements were discovered during Mendeleev's time?
a)
63
b)
56
c)
101
d)
34
7.
Which statement is not a difference between Mendeleev's table and the modern periodic table?
a)
there are no transition elements Mendeleev's table.
b)
Elements are arranged according to atomic no. not atomic mass.
c)
no gaps in the modern periodic table.
d)
much more than 60 elements in the modern periodic table.
8.
A ___________ is an arrangement of elements in columns
a)
columns
b)
rows
c)
periodic table
d)
electron shell
9.
Each column in the periodic table is called a
a)
period
b)
group
c)
cluster
d)
unit
10.
Particles in an atom's nucleus that are neutral and have no charge are
a)
megatrons.
b)
electrons.
c)
neutrons.
d)
protons.
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