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Atom
Atom is he fundamental building block of matter. An atom consists mainly protons, neutrons, and electrons. Neutrons have no electrical charge. Protons and Electrons have a positive and negative electrical charge successively. Protons and neutrons are found in the nucleus of the atom. Electrons circle around nucleus.
Chemical reactions involve interactions between the electrons of one atom and the electrons of another atom. Atoms which have different amounts of electrons and protons have a positive or negative electrical charge and are called ions. When atoms bond together, they can make larger building blocks of matter called molecules.
Atoms cannot be divided using chemicals. They do consist of parts, which include protons, neutrons, and electrons, but an atom is a basic chemical building block of matter.
Each proton has a positive electrical charge and each each electron has an equal negative electrical charge. Electrons and protons are electrically attracted to each other.
Neutrons do not have a charge and are not electrically attracted to either electrons or protons.
Protons and neutrons are about the same size.
The mass of a proton is essentially the same as that of a neutron. The mass of a proton is 1840 times greater than the mass of an electron.
The nucleus of an atom contains protons and neutrons. The nucleus carries a positive electrical charge. Almost all of the mass of an atom is in its nucleus
Electrons move around outside the nucleus. Almost all of the volume of an atom is occupied by electrons.
The number of protons in the nucleus known as its atomic number and determines the element. Varying the number of neutrons called isotopes. Varying the number of electrons results in ions within the domain of same element.
The particles within an atom are bound together by powerful forces. In general, electrons are loosely bound in the atom than protons or neutrons. Chemical reactions largely involve atoms or groups of atoms and the interactions between their electrons.
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