Trystan Casey
Atoms are the building blocks of the universe, and everything in it is made up of atoms. The center of an atom is called the nucleus, which contains protons and neutrons. Protons have a positive charge, while neutrons have no charge. Electrons, which have a negative charge, spin around the nucleus in shells. The attraction between the positively charged protons and negatively charged electrons is what keeps an atom in balance. This balance can be disrupted when electrons in the outermost shells are pushed out of their orbits by an external force, causing them to shift from one atom to another. These shifting electrons are what we call electricity.
| Characteristics | Values |
|---|---|
| Part of the atom causing electricity | Electrons |
| Charge of protons | Positive (+) |
| Charge of electrons | Negative (-) |
| Charge of neutrons | Neutral |
| Shell closest to the nucleus | Holds two electrons |
| Second shell | Holds up to eight electrons |
| Outer shells | Hold more electrons |
| Atoms with many protons | Can have up to seven shells with electrons |
| Force of attraction | Strong between electrons in the innermost shell and protons |
| Force of attraction | Weak between electrons in the outermost shell and protons |
| Shifting electrons | Cause electricity |
| Electricity | Lightning, static shock |
| Creation of electricity | Moving magnetic fields pushing and pulling electrons |
| Metals with loosely held electrons | Copper, aluminum |
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What You'll Learn
Protons and electrons carry electrical charge
Atoms are the building blocks of matter. Everything in the universe, from stars to trees, animals, and humans, is made of atoms. Atoms are so small that millions of them could fit on the head of a pin.
The center of an atom is called the nucleus, which contains particles called protons and neutrons. Protons have a positive charge, while neutrons are neutral and carry no charge. Electrons, which have a negative charge, spin around the nucleus in shells. These electrons are attracted to the protons, and an atom is in balance when it has an equal number of protons and electrons.
The protons and electrons of an atom carry electrical charge. Protons have a positive charge, denoted as (+), while electrons carry an equal negative charge (-). These opposite charges attract each other. The number of protons in an atom determines what kind of atom or element it is. For example, hydrogen (H) has one proton, while carbon (C) has six. This is reflected in the Periodic Table of Elements, which shows the atomic numbers, or the number of protons, of each element.
The electrons in an atom usually remain at a constant distance from the nucleus in precise shells. The shell closest to the nucleus can hold two electrons, while the next shell can hold up to eight. Some atoms can have up to seven shells with electrons in them. The electrons in the outermost shells may not have a strong force of attraction to the protons and can be pushed out of their orbits with an external force. These shifting electrons are what we call electricity. For example, lightning is a form of electricity where electrons move from one cloud to another or from a cloud to the ground.
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Protons and electrons are attracted to each other
Atoms are the building blocks of the universe. They are composed of protons, neutrons, and electrons. Protons and electrons carry an electrical charge, with protons having a positive charge and electrons carrying a negative one. According to the laws of electromagnetism, opposite charges attract each other. Therefore, protons and electrons are attracted to each other.
However, it is important to note that protons and electrons within the same atom do not interact with each other. This is known as the "forbidden interaction" and is fundamental to the stability of atoms and the universe. Several theories attempt to explain this phenomenon. One theory suggests that electrons in motion, or with kinetic energy, tend to keep moving or "hopping," preventing them from combining with protons. This kinetic energy acts as a form of repulsion, counteracting the force of attraction between the electron and the proton.
Additionally, the concept of quantised states suggests that particles tend to remain in specific energy levels or orbits. Changing the state of an electron requires external energy input. This helps explain why electrons do not simply fall into the nucleus and combine with protons, despite the attractive forces at play.
While the attraction between protons and electrons exists, it is not the only factor influencing the overall behaviour of particles within an atom. Other forces, such as the spread-out nature of electrons and the confinement energy they experience, contribute to the overall stability of the atom.
In summary, while protons and electrons are attracted to each other due to their opposite electrical charges, various factors and forces within the atom prevent their collision or combination. This delicate balance between attractive and repulsive forces is essential for the stability of atoms and the universe as we know it.
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Electrons spin around the nucleus in shells
Atoms are the building blocks of the universe. Everything in the universe, from stars to animals, is made up of atoms. The human body, air, and water are all composed of atoms. The center of an atom is called the nucleus, which is a dense, positively charged part of the atom made up of particles called protons and neutrons. Protons have a positive charge, while neutrons carry no charge. The number of protons in an atom determines the type of atom or element it is.
Electrons, which have a negative charge, spin around the nucleus in shells. Electrons cannot be at any arbitrary distance from the nucleus; they can only exist in specific locations called allowed orbits. This property was first explained by Danish physicist Niels Bohr in 1913 and is a result of quantum mechanics. Bohr proposed that electrons are locked into orbits at very specific distances from the nucleus, with a minimum distance that they could not go beyond. The existence of these electron shells was first observed experimentally by Charles Barkla and Henry Moseley through X-ray absorption studies.
Each shell is composed of one or more subshells, and each subshell consists of one or more atomic orbitals. The shell closest to the nucleus can hold two electrons, while the next shell can hold up to eight. The outer shells can hold even more electrons. The outermost shell of electrons is called the valence shell, and it determines the chemical behavior of an atom. Electrons in the outermost shells may not have a strong force of attraction to the protons and can be pushed out of their orbits. These shifting electrons are what we call electricity.
The modern electron shell theory was developed by Edmund Stoner in 1923, and Wolfgang Pauli added a fourth quantum number, "spin," in 1925. Electrons can spin in a clockwise or counterclockwise direction, also known as spin up and spin down in physics jargon. Quantum mechanics explains why electrons can keep spinning indefinitely, providing insight into the inner workings of atoms and the fundamental nature of electricity.
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Electrons can be pushed out of their orbits
Atoms are the building blocks of the universe. Everything in the universe, from stars to trees, animals, and humans, is made of atoms. While the picture of electrons "orbiting" the nucleus like planets around the sun is a popular one, it is not entirely accurate. Electrons are not physical objects with volume, shape, or size. Instead, they are wavefunctions, or smeared-out areas of probability of where the electron could be. These are known as
Electrons spin around the nucleus of an atom in shells or orbitals. They can jump between these orbitals, radiating or emitting energy. Electrons usually remain a constant distance from the atom's nucleus in precise shells. The shell closest to the nucleus can hold two electrons, while the next shell can hold up to eight. The outermost shells can hold even more. However, the electrons in the outermost shells may not have a strong force of attraction to the protons. These electrons can be pushed out of their orbits or shifted from one atom to another by applying force. This movement of electrons is what we call electricity. For example, lightning is a form of electricity where electrons move from one cloud to another or jump from a cloud to the ground.
The number of electrons in an atom's shells can vary. Atoms with many protons can have up to seven shells with electrons in them. Electrons in the shells closest to the nucleus have a strong force of attraction to the positively charged protons. This attraction is due to the balance between the electrostatic force and the centrifugal force. The electrostatic force, or electromagnetic force, is the attraction between the positively charged protons in the nucleus and the negatively charged electrons. On the other hand, the centrifugal force arises from the motion of the electrons around the nucleus and is an outward force that results from the electrons' momentum and velocity. This force counteracts the inward pull of the electrostatic force, creating a stable equilibrium for the electrons within the atom.
While electrons can move between orbitals and absorb or emit energy, they cannot simply fall or collapse into the nucleus. This is because, as they approach the nucleus, their potential energy becomes more negative, approaching negative infinity. At the same time, their kinetic energy (or "confinement" energy) increases, causing their momentum and velocity to shoot up toward positive infinity. This "battle of the infinities" results in a compromise where the fall in potential energy is balanced by the increase in kinetic energy, preventing the electron from falling into the nucleus.
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Protons and neutrons determine the atom's balance
Atoms are made up of extremely tiny particles called protons, neutrons, and electrons. Protons carry a positive charge, electrons carry a negative charge, and neutrons carry no charge. Protons and neutrons are in the center of the atom, forming the nucleus, while electrons surround the nucleus. The positive and negative charges of protons and electrons are of equal magnitude but opposite, and they attract each other due to their opposite charges. This attraction holds an atom together.
For an atom to be neutral, it must have the same number of electrons and protons. In other words, an atom is in balance when it has an equal number of protons and electrons. This balance is crucial for the stability of the atom. Electrons in the outermost shells of an atom may not have a strong force of attraction to the protons, and they can be pushed out of their orbits or shifted from one atom to another when a force is applied. This movement of electrons is what we refer to as electricity.
Protons and neutrons play a significant role in determining the atom's balance. While the number of electrons in an atom can vary due to their ability to move between atoms, the number of protons and neutrons remains constant for a specific atom. The number of protons in an atom determines the type of atom or element it is. Each element on the Periodic Table of Elements is distinguished by the number of protons its atoms contain. For example, every hydrogen (H) atom has one proton, while every carbon (C) atom has six protons.
Neutrons, despite having no charge, are also crucial in maintaining the atom's balance. They contribute significantly to the mass of the atom, as they have approximately the same mass as protons, which is about 2000 times the mass of an electron. Neutrons also contribute to the stability of the atom by providing a strong nuclear force that binds the protons together in the nucleus. While the number of neutrons can vary within atoms of the same element, this variation does not change the type of element. Atoms of the same element with different numbers of neutrons are called isotopes.
In summary, protons and neutrons are essential for determining the atom's balance. They form the nucleus of the atom and contribute to its mass and stability. The number of protons defines the type of element, while the number of neutrons distinguishes different isotopes of the same element. Meanwhile, the number of electrons must balance the number of protons to maintain the atom's electrical neutrality and stability. This delicate balance between protons and electrons, influenced by the presence of neutrons, is fundamental to understanding the behavior of atoms and the flow of electricity.
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Frequently asked questions
Electrons are critical to the workings of electricity. Shifting electrons are electricity.
Electrons are particles that spin around the nucleus of an atom in shells. They carry a negative charge.
Applying an external force can cause electrons in the outermost shells to shift from one atom to another. This force can be applied by using magnets or by using coils of wire.
When electrons shift, they create an electrical current. This current is what we use to power our homes and devices.
