CH.5 key concepts

Question 1

how did Mendeleev organize the elements in his periodic table

Answer 1

Mendeleev arranged the elements into rows in Order of increasing mass so that elements with similar properties were in the same column

Question 2

what evidence helped verify the usefulness of Mendeleev’s table?

Answer 2

the close match between Mendeleev’s predictions and the actual properties of new elements showed how useful his table can be

Question 3

how is the modern periodic table organized

Answer 3

in the modern periodic table,elements arranged by increasing atomic number

Question 4

what does the atomic mass of an elements depend on

Answer 4

it depends on the distribution of an elements isotopes in nature and the masses of those isotopes