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Chemistry Quiz

Who was the first person to organize the periodic table?
Johann Wolfgang Dobreiner
Isaac Newton
John Dalton
Mendeleev
When were Dobreiner's triads made?
1864
1829
1847
1899
How many elements were in the triad's table?
42
33
29
18
The atomic mass of the middle element is approximately the mean of the other two elements, True or False?
True
False
Who was the next scientist to attempt to classify the elements?
Newlands
Dalton
Einstein
Mendeleev
How many elements were discovered when the second attempt to classify elements were made?
36
46
56
23
How did Newland classify his elements?
In increasing order of their atomic masses
In decreasing order of Atomic number
Alphabetical order
In decreasing order of atomic masses
What did Newland call his classification?
Newlands octaves
Newlands notes
Newlands order
The Solution
Why was newlands classification wrong?
Because he could only arrance up to Calcium
He was off on the atomic mass
The atomic numbers were incorrect
It had imaginary elements
Who was the 3rd scientist to classify the elements
Mendeleev
Dalton
Moseley
Newland
Mendeleev arranged his elements in increasing order of atomic numbers, true or false?
False
True
How many elements did the first periodic table have?
63
56
71
100
What does Mendeleev's law state?
Physical and Chemical properties are a periodic function of their atomic masses
You cannot know the velocity and position of a particle
What are the horizontal rows called in Mendeleev's periodic table?
Periods
Rows
Groups
Orbitals
How many periods are there in Mendeleev's periodic table?
7
10
9
3
What are the vertical columns in Mendeleev's periodic table called?
Rows
Groups
Periods
Orbitals
Who was the fourth scientist to classify the elements?
Moseley
Dalton
Einstein
Mendeleev
What did Henry Moseley discover?
Orbitals
The atomic number is the most fundamental property of the periodic table
Electrons
Protons
What did Mendeleevs Periodic turn into?
Modern periodic table
Electrons classified
Moseleys table
Periodic Law
When did Henry Moseley make his discorvery?
1913
1932
1947
1921
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