This geological process created complex molecules of hydrogen and carbon. Oil can also contain other elements. Crude oil, or unprocessed petroleum, is called sour when it contains a lot of sulfur, an impurity. Sour crude requires more refining than sweet crude, which is often more valuable. Ite...
Salt water consists of water (H₂O) and salt (NaCl). There are four different elements present, but they are not all combined chemically. The water molecules and salt molecules exist together but aren’t chemically combined. Therefore, salt water is not a compound. Instead, saltwater is co...
Some elements, such as He, exist as molecules in atomic, or monatomic, form. For these, an atom is a molecule. Others, like oxygen (O2) exist in diatomic form in their natural state, because this is energetically favorable. Finally, acompoundis something containing more than one kind of ...
As previously mentioned, a cell's cytoplasm is home to numerous functional and structural elements. These elements exist in the form of molecules and organelles — picture them as the tools, appliances, and inner rooms of the cell. Major classes of intracellular organic molecules include nucleic ...
Organelles are elements inside a cell that possess a double plasma membrane like the one surrounding the cell as a whole. The more notoriousmembrane-bound organellesinclude: Nucleus:This contains the cell's DNA. The nucleus is often excluded from discussions of "organelles" because of its stand-...
The element zirconium is used in the production of many everyday objects, energy, and even jewelry! Read this lesson to find out how zirconium is used and how it touches your life every day. What Is Zirconium? One of the elements included in the period table of elements iszirconium. Like...
powered by energy they had developed the skills to create to assist in that end, had once occupied this planet. But only if they drop in before the whole Earth is redistributed as its constituent elements as our Red Giant Sun consumes the Earth we were told to leave the resources we need...
What intermolecular forces can exist in a gaseous sample of HCl? Which intermolecular forces does a polar molecule have? Which intermolecular forces does a non-polar molecule have? What is the difference between elements, molecules, and compounds? What property of an at...
This is why, Schwarz says, ‘when we talk about elements we should also talk about timescales’. He wonders whether an ‘element’ should at least be an entity capable in principle of forming molecules. ‘Chemistry is a craft and science of real materials,’ he adds – but ‘for physicist...
Other pages in this section include elements, mixtures and compounds and individual pages about substances, elements, mixtures and compounds, plus pages about atoms, molecules and isotopes. If you need further information ask your chemistry tutor.In the News:...