You know that a generic atom has some protons and neutrons in the nucleus and some electrons zipping around in orbitals. When those pieces start combining in specific numbers, you can build atoms with recognizable traits.
If you have eight protons, neutrons and electrons, you will have an oxygen O atom. If you have seven protons, neutrons, and electrons, you will have a nitrogen N atom.
The atoms for each element are unique, even though they are all made of similar subatomic parts. Remember that 'atom' is the general term. Everything is made of atoms.
The term 'element' is used to describe atoms with specific characteristics. There are almost known elements. For example, you are made up of billions of billions of atoms but you probably won't find more than 40 elements types of atoms in your body. The Same Everywhere As far as we know, there are a limited number of basic elements.
Up to this point in time, we have discovered or created about Scientists just confirmed the creation of element in While there are more elements to discover, the basic elements remain the same. Iron Fe atoms found on Earth are identical to iron atoms found on meteorites. The iron atoms in the red soil of Mars are also the same.
With the tools you learn here, you can explore and understand the Universe. You will never stop discovering new reactions and compoundsbut the elements will be the same.
The List of Elements Since the launch of the site, we've been asked, "Why start with 18? Remember that the orbitals are the places you will generally find the electrons as they spin around the nucleus.Here is the best resource for homework help with CHEM Chemistry at San Diego State University.
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