Describe mendeleev periodic table in short

it is very long but for kind information you can find it in your science book

Explanation:

in modern graded book

Mendeleev created a periodic table of all the elements that were known at the time. The rows of the table, called periods, each contained eight elements that increased in atomic mass from left to right. The columns of the table, called groups, contained elements with similar properties.

it's not c. i took the quiz and got it wrong. so my best guess is b.

have a great day, and hope this .