He put the elements with similar Characteristics into the same column
Mendeleev swapped elements around in the Periodic Table to allow elements with same or similar properties fall under one family/group.
They are organised into columns depending on the number of outer shell electrons. They are organized into rows depending on the number of electron shells they have, from lowest to highest.
Mendeleev arranged the elements in the order of their atomic masses. he arranged the elements in columns and rows so that the elements with same characteristics are grouped together.
when Mendeleyev changed the layout,there were gaps.how did the gaps help scientists looking for undiscovered elements
Chart layout
layout
Fixed position layout allows workers to congregate around the product to be complicated when the company working on a huge project such as airplane. This layout is an example of facility layout.
periodic means time for chuncks of time. It means that in the Periodic Table the elements are organized by when they were found, the mass number, the abreviation, the state of matter, etc.
when Mendeleyev changed the layout,there were gaps.how did the gaps help scientists looking for undiscovered elements
Sure, that is as good a way as any to change columns.
Chart Layout
chart layout
Simply, Open "MS Word" >> Click on "Page Layout" Tab >> Click on "More Columns">> Go to "Number of columns" and choose columns that you want to create>> Click "OK".
Click on "Layout" menu option at left. Now click on "Edit" link for the element which layout you want to modify. select appropriate for placement.
Print layout
The 1995 BMW 525 fuse box layout consists of two columns of fuses and one column of relay switches. The fuse columns will have 10 fuses each.
If you hover over "Journal" in the blue bar near the top a menu drops down. Click on "Select Journal Style." After you do that it should send you to "Customize Journal Style" where you can change a bunch of things like the mood smilies, the title of your journal, and at the end the layout of the columns.
CSS Grid Layout excels at dividing a page into major regions or defining the relationship in terms of size, position, and layer, between parts of a control built from HTML primitives. Like tables, grid layout enables an author to align elements into columns and rows
If you want the words to be in multiple columns like in a magazine, then go to the 'Page Layout' tab, then go to "Columns".
Most of the Joomla websites uses 3 columns and having the theme start. the website uses columns because of to be using different layout techniques that being absolute positioning.