with elements with the same valency arranged in vertical lines, strikingly similar to Mendeleev’s table. Unfortunately for Meyer, his work wasn’t published until 1870, a year after Mendeleev’s ...

Mrs Roberts: Well, elements that have similar properties to each other are put into vertical columns called groups. Now, the table is called the periodic table because the elements with similar ...

The finished puzzle is a section of the periodic table, so the numbers on each tile ... Another helpful clue is that the colors match vertically. There are many possible paths to the solution.