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Basic Physics

Basic Physics

Electron

Electron

Electron Electron An electron is one of the most important types of subatomic particles. Electrons combine with protons and (usually) neutrons to make atoms. Electrons are much smaller than neutrons and protons. The mass of a single neutron or proton is more than 1,800 times greater than the mass of an electron. An electron ...

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What are the basic laws of physics?

What are the basic laws of physics

What are the basic laws of physics? LAWS OF PHYSICS The basic laws of physics fall into two categories: classical physics that deals with the observable world (classical mechanics), and atomic physics that deals with the interactions between elementary and sub atomic particles (quantum mechanics). The basic laws of both ...

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Neutron

Neutron

Neutron neutron is a sub-atomic (meaning it is smaller than an atom) particle. The nucleus of an atom is made up of neutrons and protons. Neutrons and protons are almost exactly the same size (a neutron has about 1/10th of one percent more mass). A neutron does not have an electrical charge, unlike ...

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Proton

Proton

Proton proton is one of the most important types of subatomic particles. Protons combine with electrons and (usually) neutrons to make atoms. Protons are nearly the same size as neutrons and are much larger than electrons. A proton has a mass about 1,836 times greater than the mass of an electron, but the masses of protons ...

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Isotope

Isotope

Isotope Isotopes are different “versions” of an element. All atoms of an element have the same number of protons. For example, all hydrogen atoms have one proton, all carbon atoms have 6 protons, and all uranium atoms have 92 protons. However, atoms of an element can have different numbers of neutrons. Most carbon atoms ...

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Atomic Mass

Atomic Mass

Atomic Mass Atomic Mass One way scientists measure the size of something is by its mass. Scientists can even measure very, very tiny things like atoms. One measure of the size of an atom is its “atomic mass”. Almost all of the mass of an atom (more than 99%) is in ...

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Atomic Number

Atomic Number

Atomic Number Atomic Number The nucleus of an atom has protons and neutrons in it. Each element (like carbon or oxygen or gold) has a different number of protons in its atoms. Scientists have a special name for the number of protons in an atom. They call it the “atomic number”. Why is the atomic numbemr important? Normal ...

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Atomic Nucleus

Atomic Nucleus

Atomic Nucleus Atomic Nucleus Atoms are composed of a massive, central nucleus surrounded by a swarm of fast-moving electrons. The nucleus is made up of protons and, in most cases, neutrons. Almost all of the mass (more than 99%) of an atom is contained in the dense nucleus. An atomic nucleus is much, much smaller than an ...

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Atoms

Atoms

Atoms Atoms are the smallest size pieces that elements come in. Each atom has a small but heavy nucleus at its center. A cloud of tiny, fast-moving electrons orbit around the nucleus. The nucleus contains at least one proton. The nucleus usually also has neutrons. Most of the time there are about as many neutrons as ...

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