A pure substance is made from only one compound or just one element with no other substances mixed in. Hold up those two glasses, Katie. Imagine the pompoms represent individual chemical atoms ...

Pure substances, which are one type of matter ... For in-person lab: Students should wear chemical splash goggles, and follow all other normal laboratory guidelines. Describe the appearance of each ...

A chemical element is one of those squares ... We also, confusingly, tend to refer to pure substances made of one kind of atom, like chlorine gas, as elements. But these are very different from ...

But why is this the case? In science, a pure substance is either a chemical element or a compound. Elements are what you find on the periodic table, such as gold, iron, and helium. Compounds are ...

A pure substance is made from only one compound or just one element with no other substances mixed in. Hold up those two glasses, Katie. Imagine the pompoms represent individual chemical atoms ...