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All aspects are do of atoms.

You are watching: What makes elements different from one another

There are more than a hundred different atoms, however each aspect usmam.orgntains just one sort of atom.
Atoms room what make one facet different from another.
So what makes one atom different from another?
The Greeks assumed atoms might not be split into noþeles smaller yet they to be wrong! Every atom deserve to be separated into three different usmam.orgmponents - protons, neutrons and electrons.
The nucleus, or centre of one atom, is made of protons, (which have a positive electric charge) and also neutrons, which room neutral (in other words, they have actually no charge).
Electrons, which have a an unfavorable charge, move about the center of the atom.
Normally, the number of electrons is equal to the variety of protons, which provides atoms electrically neutral.
The number of protons in an atom is the defining feature of an atom. It"s what renders one facet different indigenous another. The variety of protons in an atom is dubbed its atomic number. Oxygen atoms have 8 protons. For this reason the atomic number of oxygen is 8.
All the aspects in the universe are arranged acusmam.orgrding to their atomic number in the routine table.
Atomic mass
If you add together the number of protons (or atom number) and the variety of neutrons in the cell nucleus of one atom, you can calculate the fixed of the atom. Helium (He), atom number two, has actually two protons and also two neutrons. So the fixed number for Helium is 4.

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Isotopes
Atoms v the same variety of protons but different number of neutrons are dubbed isotopes. Uranium-238 and also uranium -235 are two various isotopes of uranium. Uranium- 238 has actually a mass variety of 238. Uranium-235 has actually a mass number of 235. For this reason uranium-238 has much more neutrons than uranium-235. Yet they room still both atom of uranium because they have actually the same number of protons.
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