Just two strategies existed at the time to categorize these elements: separating them into metals and nonmetals or grouping them by an element's number of valence electrons (the electrons in the outermost shell). The first section of Mendeleev's book dealt with just eight of the known elements...
"And yet, a part of our cortex would appear to be specialized in reading in adults: when we have a text in front of us, a specific part of the cortex, the left fusiform gyrus, is activated to carry out this specific task. This same area is implicated in the visual recognition of ob...
The practice of decomposing numbers allows young students to understand the patterns and relationships between digits within a larger number and between numbers within an equation. You can decompose numbers into their hundreds, tens, and ones places, or you can decompose by separating numbers into th...
Right-click (or Ctrl-click, on a Mac) the duplicate image and select Image from the popup menu. From there, select Mode.[29] 4 Choose Decompose. In the Colors > Components menu, choose Decompose. This will open the Decompose dialog box.[30] 5 Select LAB and check Descompose to la...