The scientists will tell you the number of elementary particles in atoms each type using nuclear symbol, which consists of the numbers 2 amount. In the bottom left, and on the left of the element symbol (X) by
.The numbers in the bottom left, called the "atomic number" (Z)
numbers in a position on the left is called "Metis" (A)
atomic number (Atomic Number). Use of the symbol is Z
.The numbers of protons (P) for the same element must have a number of protons (P) is always the same, that is, atomic number must be equal. Therefore, different types of elements are atomic number unique. In a neutral atom by the proton (P).(E)
.Therefore, atomic number Z = number of protons (P) = number of electrons (E) = Z
mass number (Mass Number) using the symbol is A
is the number shows the sum proton. (P), and neutrons (n) in atomic nuclei
so mass number a = number of protons (P) number of neutrons (n) = A
.That is, the number of neutrons (n) obtained from mass number - atomic number Z
or number of neutrons (n) = A - Z
Table 3 sign nuclear and elementary particle of the elements of some kind
.
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