That way, they will develop an understanding of the material world around them while ... be a helpful way to make vocabulary more meaningful to all students, not just ELLs. When learning chemical ...

organizes all discovered chemical elements in rows (called periods) and columns (called groups) according to increasing atomic number. Scientists use the periodic table to quickly refer to information ...

The chemical symbol for oxygen is O ... The chemical elements were discovered and/or isolated by scientists all over Europe and elsewhere in the world. Sometimes these events weren’t recorded ...