The Periodic Table

"When all the elements are arranged in atomic weight order, periodic repeatability is obtained, which is expressed by the periodic rule."

"Here is the proof that there is a basic quantity at an atom: As the element progresses from one element to the next, it gradually increases, this number can only be the charge of the central positive nucleus There is clear evidence. "

"The chemical composition of atoms depends only on the number of electrons, which is equal to the number of protons, called atomic numbers.The chemistry is the idea that Pythagoras wants, if you are an atom with a proton , You are hydrogen, the second is helium, ... .... "

2 History of the Periodic Table Mendeleev places the elements in the world's first periodic table and Mendeleev increases the atomic number and increases atomic weight by comparing the number of mutually reactive elements to the world's first periodic table Place elements in. Quality by comparing the number of elements that react with each other 3 The modern periodic table is different from the Mendeleev table - he does not know that protons and electrons are different from the Mendeleev table - he knows that protons and electrons I do not know to increase the number of atoms. Mass proton number Proton number Electron number Electronic number It is not mass increasing atom number than electron number

Please look carefully at periodic table A. The history of the boundary table Mendeleev arranged these elements in the world's first periodic table, Mendeleev arranged

In the standard period table, the elements are listed in ascending order of element number Z (the number of protons in the nucleus). When a new electron shell has its first electron, a new line (cycle) begins. Columns (groups) are determined by the electronic configuration of the atoms and elements with the same number of electrons in a particular subshell are in the same column (eg oxygen and selenium are in the outermost p subshell so that the same column ). There are four electrons in the center. Elements with similar chemical properties generally belong to the same family of the periodic table, but in some aspects of the f block and d block elements of the same period tend to have similar properties. Therefore, it is relatively easy to predict the chemical nature of an element if you know the nature of the element around the element.

A framework called Periodic Table is created to classify information on the properties of all known elements present on the earth. Each box of the periodic table contains information on the chemical symbol, name, and atomic weight of each element. Regular placement of this element information is not as easy as it is now.

In the Periodic Table of Elements, the elements are grouped according to electronic structure. The golden periodic table is in phase 6 (horizontal row) and group 11 (vertical row), and other metal metals such as silver and copper. These metals are very suitable for recycling because of their excellent abrasion resistance. Common functions of the Gold element include low resistance inert and corrosion resistant metals. Use of gold: More than half of the world's gold is used for jewelry, and it usually leads to recycling. One-third is used for investment and stock holding. People can buy gold coins and gold bars for their portfolio. Most gold bars are flat, but some investors in Europe like brick shapes. 12% of gold is used for industries such as mobile phones and can not be reused.