Periodic table

Question 1

What is the arrangement of the elements in Mendeleev’s periodic table based on?

Answer 1

Elements were arranged in order of increasing atomic weight

Question 2

What were the gaps in Mendeleev’s periodic table meant for?

Answer 2

Undiscovered elements

Question 3

How did Mendeleev predict the properties of undiscovered elements?

Answer 3

Using the properties of elements in the same group

Question 4

How is the modern periodic table different from Mendeleev’s in terms of arrangement of elements?

Answer 4

Modern periodic table is arranged in order of atomic number (protons) and includes group 0 noble gases

Mendeleev’s table is arranged in order of atomic weight
Group 0 noble gases were not fully discovered

Question 5

What is the modern periodic table based on in terms of element arrangement?

Answer 5

arranged in order of atomic number (protons)

Question 6

What was not yet fully discovered when Mendeleev’s periodic table was created?

Answer 6

Noble gases and protons

Question 7

Why were noble gases not included in Mendeleev’s periodic table?

Answer 7

Not yet fully discovered