Atoms are the basic particles of the chemical elements and the fundamental building blocks of matter. An atom consists of a nucleus of protons and generally neutrons, surrounded by an electromagnetically bound swarm of electrons. The chemical elements are distinguished from each other by the number of protons that are in their atoms. For example, any atom that contains 11 protons is sodium, and any atom that contains 29 protons is copper. Atoms with the same number of protons but a different number of neutrons are called isotopes of the same element.
Atoms are extremely small, typically around 100 picometersacross. A human hair is about a million carbon atoms wide. Atoms are smaller than the shortest wavelength of visible light, which means humans cannot see atoms with conventional microscopes. They are so small that accurately predicting their behavior using classical physics is not possible due to quantum effects.
More than 99.94% of an atom's mass is in the nucleus.[1]Protons have a positive electric charge and neutrons have no charge, so the nucleus is positively charged. The electrons are negatively charged, and this opposing charge is what binds them to the nucleus. If the numbers of protons and electrons are equal, as they normally are, then the atom is electrically neutral as a whole. A charged atom is called an ion. If an atom has more electrons than protons, then it has an overall negative charge and is called a negative ion (or anion). Conversely, if it has more protons than electrons, it has a positive charge and is called a positive ion (or cation).
The electrons of an atom are attracted to the protons in an atomic nucleus by the electromagnetic force. The protons and neutrons in the nucleus are attracted to each other by the nuclear force. This force is usually stronger than the electromagnetic force that repels the positively charged protons from one another. Under certain circumstances, the repelling electromagnetic force becomes stronger than the nuclear force. In this case, the nucleus splits and leaves behind different elements. This is a form of nuclear decay.
Bohr model
A problem in classical mechanics is that an accelerating charged particle radiates electromagnetic radiation, causing the particle to lose kinetic energy. Circular motion counts as acceleration, which means that an electron orbiting a central charge should spiral down into that nucleus as it loses speed. In 1913, the physicist Niels Bohr proposed a new model in which the electrons of an atom were assumed to orbit the nucleus but could only do so in a finite set of orbits, and could jump between these orbits only in discrete changes of energy corresponding to absorption or radiation of a photon.[20] This quantization was used to explain why the electrons' orbits are stable and why elements absorb and emit electromagnetic radiation in discrete spectra.[21] Bohr's model could only predict the emission spectra of hydrogen, not atoms with more than one electron.
In 1925, Werner Heisenberg published the first consistent mathematical formulation of quantum mechanics (matrix mechanics).[30] One year earlier, Louis de Broglie had proposed that all particles behave like waves to some extent,[31] and in 1926 Erwin Schrödinger used this idea to develop the Schrödinger equation, which describes electrons as three-dimensional waveforms rather than points in space.[32] A consequence of using waveforms to describe particles is that it is mathematically impossible to obtain precise values for both the positionand momentum of a particle at a given point in time. This became known as the uncertainty principle, formulated by Werner Heisenberg in 1927.[30] In this concept, for a given accuracy in measuring a position one could only obtain a range of probable values for momentum, and vice versa.[33] Thus, the planetary model of the atom was discarded in favor of one that described atomic orbital zones around the nucleus where a given electron is most likely to be found.[34][35] This model was able to explain observations of atomic behavior that previous models could not, such as certain structural and spectral patterns of atoms larger than hydrogen.
The number of protons and neutrons in the atomic nucleus can be modified, although this can require very high energies because of the strong force. Nuclear fusion occurs when multiple atomic particles join to form a heavier nucleus, such as through the energetic collision of two nuclei. For example, at the core of the Sun protons require energies of 3 to 10 keV to overcome their mutual repulsion—the coulomb barrier—and fuse together into a single nucleus.[46] Nuclear fission is the opposite process, causing a nucleus to split into two smaller nuclei—usually through radioactive decay. The nucleus can also be modified through bombardment by high energy subatomic particles or photons. If this modifies the number of protons in a nucleus, the atom changes to a different chemical element.[47][48]
Electron cloud
The electrons in an atom are attracted to the protons in the nucleus by the electromagnetic force. This force binds the electrons inside an electrostatic potential well surrounding the smaller nucleus, which means that an external source of energy is needed for the electron to escape. The closer an electron is to the nucleus, the greater the attractive force. Hence electrons bound near the center of the potential well require more energy to escape than those at greater separations.
Electrons, like other particles, have properties of both a particle and a wave. The electron cloud is a region inside the potential well where each electron forms a type of three-dimensional standing wave—a wave form that does not move relative to the nucleus. This behavior is defined by an atomic orbital, a mathematical function that characterises the probability that an electron appears to be at a particular location when its position is measured.[51] Only a discrete (or quantized) set of these orbitals exist around the nucleus, as other possible wave patterns rapidly decay into a more stable form.[52] Orbitals can have one or more ring or node structures, and differ from each other in size, shape and orientation.[53]
Each atomic orbital corresponds to a particular energy level of the electron. The electron can change its state to a higher energy level by absorbing a photon with sufficient energy to boost it into the new quantum state. Likewise, through spontaneous emission, an electron in a higher energy state can drop to a lower energy state while radiating the excess energy as a photon. These characteristic energy values, defined by the differences in the energies of the quantum states, are responsible for atomic spectral lines.[52]
The amount of energy needed to remove or add an electron—the electron binding energy—is far less than the binding energy of nucleons. For example, it requires only 13.6 eV to strip a ground-state electron from a hydrogen atom,[54] compared to 2.23 millioneV for splitting a deuterium nucleus.[55] Atoms are electrically neutral if they have an equal number of protons and electrons. Atoms that have either a deficit or a surplus of electrons are called ions. Elec
Alright, so I pulled out my slinky toy model of a Proton Torus with Muon inside.Now for uranium-238 there would be 92 X 840 =77,280 rings as one big torus, and inside would be a chain of 92 muons each 105 rings thrusting through the uranium atom proton torus in the Faraday Law.So, a Neutron in New Physics is a Parallel Plate Capacitor that stores and grows from 1 eV all the way out to 945MeV when fully grown after some 140 million years of Faraday Law Growth.Now in the reading above of how to turn 238U into 239Pu by radiating the Uranium atom with a Neutron, begs the question of how does the Uranium + Neutron transform over into a 94 x 840 =78,960 rings of 1 MeV each for the Plutonium 239 Proton Torus??????This developing 239Pu Atom has to take the Neutron into its 77,280 rings plus alter an existing neutron in the 238U, an existing neutron converting to a 840 rings with 105 rings added to the muons inside.The easiest way possible according to my eyes would be to make a snip of the 77,280 rings (if all the rings are connected like in a slinky toy, and make a snip into the neutron 945 rings (neutron converted into a torus of 840 + 105).Then join the new muon inside with the 92 muons then join the new proton addition of 840 new rings. Making a 239Np atom.Now the 239Np atom takes one of its Neutrons and converts it from parallel plate capacitor to that of 840 proton rings with 105 muon rings. And does the process all over again of a snip cut into the huge 78,120 rings of Np and allows 105 muon rings inside, then attaches the new second proton torus of 78,120 + 840 =78,960 rings to make 239Pu.Now Old Dumb Physics talks about a double Beta decay in this entire process. They maybe correct.New Physics would question if the snip cuts into the 238U then the 239Np is the Cause of the double Beta decay of two magnetic monopoles of 0.5MeV????Are the two snip cuts to form 239Np then 239Pu, the after-effect that is seen as 2 Beta decays???????I will have to ponder this question for awhile, to make more progress.AP, King of Science
In geometry, a tractrix (from Latin trahere 'to pull, drag'; plural: tractrices) is the curve along which an object moves, under the influence of friction, when pulled on a horizontal plane by a line segmentattached to a pulling point (the tractor) that moves at a right angle to the initial line between the object and the puller at an infinitesimal speed. It is therefore a curve of pursuit. It was first introduced by Claude Perrault in 1670, and later studied by Isaac Newton(1676) and Christiaan Huygens (1693).[1]
--- quoting Wikipedia---Graph paperMathematical tool
How should we see those 6 points drawn as a Curve, a circle curve???
We take a broad wire that goes through the 6 circle centers plus passes through the points of intersection of each 6 circles where the wire even envelopes some of the empty space of hyperbolic triangles..
AP axioms---------------1) A point in geometry is a 3 dimensional figure with a tiny finite length, finite width, and finite depth. The limit of this finite is the infinity borderline 10^-603 ending at 1*10^-604 as determined by the 3 zero digits in a row in pi.
2) Two points determine a unique circle in 3D space using circle-lattice points, and a unique straight line segment in 3D using a square-lattice points.
3) Three noncollinear points determines a unique plane. Since points are 3 dimensional with length, width, depth a plane is 3 dimensional with length, width, depth. But the depth of a plane must be a quantum discrete 1 point.Also, in the definition of plane, it can be either a square-lattice plane or a circle-lattice plane and cannot mix the two. Perhaps the lattices can switch from one form into another.Just today in the mail I received SCIENCE NEWS, Sept 2026 and they have an article on Static electricity saying "But what actually causes electric charge to leap from one object to another remains elusive. Centuries of efforts by scientists have failed to solve its mysteries--"We all know that circuits of electricity require smooth curves, for if you have vertices in a circuit, the magnetic monopoles 0.5MeV particles tend to leap off at the vertex.
And we can see the truth of this in geometry by Harold Jacobs 1987 GEOMETRY, pages 580 and 581 with his two definitions.Definition: A great circle of a sphere is a set of points that is the intersection of the sphere and a plane containing the center.Definition: Polar points are the points of intersection of a line through the center of the sphere with the sphere.What Jacobs was trying to get across is in Riemannian (elliptic geometry) there are no Parallel lines parallel from a line and a point not on the line, the Parallel Postulate.But Jacobs had no logic brain when he wrote his Non-Euclidean geometry chapter, for, well, where is his model of Lobachevskian geometry (hyperbolic geometry). When I was young in college in the very early 1970s the best model for Lobachevskian was a saddle shape figure, but still that is horribly inadequate. Then some kookish math professors came up with the Pseudosphere. They cannot even draw the pseudosphere.