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They themselves have opposite charges, and human beings later artificially stipulated that the glass rod rubbed with silk is positively charged, and the plastic rod rubbed with fur is negatively charged, and the charge of the proton belt is the kind of charge carried by the glass rod after the glass rod rubbed by silk, and the charge of the electron belt is the kind of charge carried by the plastic rod rubbed with the fur, so it is stipulated that the electron is negatively charged, and the proton is positively charged.
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Electrons and protons are respectively oppositely charged, stipulating that electrons are negatively charged and protons are positively charged.
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The material world is divided into positive matter and antimatter, and there's no why, it's just that because we happen to be made up of positive matter, and where there's a lot of positive matter, there's very little antimatter (and now scientists are looking for traces of antimatter), and if we happen to be born in the antimatter region, you'd probably wonder why electrons are electrons positive and protons are negative.
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This is their own property.
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When the positive and negative charges were originally stipulated, it was stipulated that the charge carried by the glass rubbed with fur was positive, and the charge carried by fur was negative. The property of the charge carried by the proton is the same as that of the glass rubbed by the fur, so the charge carried by it is positive, and the same goes for it
The charge carried by an electron is the same as that carried by a fur, so its charge is negative.
However, there is another type of matter in nature called antimatter.
That is, electrons are positively charged and protons are negatively charged.
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Categories: Lee Sen Min Engineering.
Problem description: Why do electrons appear negatively charged and why do protons appear positive?
Analysis: They themselves have opposite charges, and human beings later artificially stipulated that the glass rod rubbed with silk is positively charged, and the plastic rod rubbed with fur is negatively charged, and the charge of the proton is the charge carried by the glass rod after the silk is rubbed by silk, and the charge of the electron belt is the charge carried by the plastic rod rubbed with the fur, so it is stipulated that the electron is negatively charged, and the proton is positively charged.
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In physics, it is said that if an object has the property of attracting small and light objects, it is said that it is charged or charged. This statement clarifies the relationship between "electric charge" and "electricity" in the original sense, and "electricity" here refers to electricity in the most general sense.
And "electric charge" is a measure or a form of expression. It is often said that "electricity" is a macroscopic concept, and "electric charge" is, as the name suggests, the load of a microscopic particle. "Electricity" can refer to a lot in everyday life, such as current, electrical energy, etc., and we can usually simply call it "electricity".
The current is the directional movement of the electric charge, and the electrical energy is the energy of the electric current when it does work externally. Sometimes "electricity" and "charge" can be used interchangeably, depending on the situation. In general, the concept of "electricity" is relatively broad, and it can refer to a lot, and "charge" focuses on "charge", that is, the load of electricity.
Regarding the definition of positive and negative charges, it is also defined in college physics, which is a macroscopic interpretation, an ancient definition. There is also a definition in physics: the electricity of the proton belt is specified as a positive charge, and the electricity of the electron belt is specified as a negative charge.
Because these two kinds of electricity have an essential difference, they need to be distinguished, so they have given names such as "positive" and "negative", which have nothing to do with nature, just a name. There are several ways in which an electric charge is generated:
1.Triboelectric 2Contact is electrified. 3.Inductive charged.
Triboelectric is the simplest and most common method. The friction of the glass rod with the silk makes the glass rod positively charged, and the friction of the rubber rod with the fur makes the rubber rod negatively charged. Objects are all made up of positively charged nuclei and negatively charged electrons.
There are two kinds of ordinary substances, so they are electrically neutral. And the ability of silk to comfort electrons is stronger than the ability of the glass rod to bind electrons, so after friction, the silk gains electrons, and the glass rod loses electrons, so the glass rod has an extra positive charge, so it is positively charged. In the same way, rubber rods have a stronger ability to bind electrons than fur, so the electrons acquired are negatively charged.
In triboelectric activation, a certain charge is transferred from one object to another, so that the neutralization state of both objects is destroyed, and each becomes electrically apparent. For example, in the process of negative charge transfer, the party that loses it becomes positively charged, and the party that gains it wears negative charge, so that the two objects have an equal amount of different charges.
Hope it solves your problem.
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Protons are positively charged elementary particles that are present in the nucleus of an atom. Extranuclear electrons are elementary particles with a negative charge that move around the nucleus of an atom. In an atom, the number of protons is equal to the number of electrons outside the nucleus because the positive and negative charges balance each other, making the entire atom electrically neutral.
However, there are times when an atom may lose or gain electrons. When an atom loses one or more electrons outside the nucleus, it becomes an ion with a positive charge. This is because the number of positively charged protons exceeds the number of negatively charged electrons, causing the charge to be out of balance.
So, even though the number of protons and the number of electrons outside the nucleus are initially the same, when ionization occurs, the atom is positively charged.
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Because the protons in the atom are positively charged, and the atom is not electrically external, the electrons are negatively charged.
The atom, the basic unit of matter, is made up of electrons, neutrons, and protons. Neutrons are not charged, protons are positively charged, and atoms are not electrically charged to the outside. Relative to the nucleus of neutrons and protons, the mass of electrons is extremely small.
The mass of a proton is about 1840 times that of an electron.
Electrons belong to the lepton class among subatomic particles. Leptons are considered to be one of the elementary particles that make up matter. It has 1 2 spins, which is another fermion (according to the Fermi-Dirac false command).
The charge carried by the electron is e = coulomb), the mass is , the energy is , and is usually expressed as e.
The antiparticle of an electron is a positron, which carries the same differential pure mass, energy, spin, and an equal amount of positive charge as the electron (+1 for the positron and -1 for the negative electron).
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Because: for each kind of substance, the number of positive charges carried by the nuclei that compose them is equal to the number of negative charges carried by the nucleus, (the amount of charges is equal), and it is not electrically shown to the outside, if for some reason such as: friction, etc., the atoms of one substance gain electrons, and there is an excess negative charge, which is negatively charged, and the atoms of another substance lose electrons, and they have a positive charge. As shown in Fig
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Such a situation is not electrified.
For the left positive charge, if the right electron is lost, it becomes positively charged.
On the contrary, if you get another electron at this time, it will naturally be negatively charged. This is for electrically neutral substances.
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When the number of protons is the same as the number of electrons, the atom is electrically neutral (physics does not distinguish between positive and negative atoms).
Electrons are one of the elementary particles that make up atoms and have an extremely small mass with a unit negative charge.
So the atom gets electrons negatively charged and loses electrons positively charged.
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The atom itself is electrically neutral, the number of charges in the nucleus is equal to the number of electrons outside the nucleus, it is not charged, the electrons are negatively charged, and the ions are negatively charged after the electrons are obtained, and the electrons are positively charged when they are lost.
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