Physical and chemical properties of chemical elements 100 to 116 There are at least 10 types of chem

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1. Physical properties.

Commonly known as gold, the chemical element symbol is AU, which is a metal with a yellow luster. **It has the characteristics of good physical properties, high ductility and scarce quantity.

Gold is the most ductile and malleable metal. The ductility of nanoscale gold materials is significantly different, extremely brittle, brittle, and the 300-atom-thick gold leaf must be sucked up by static electricity with red squirrel hair, otherwise it is very easy to be destroyed.

Pure gold is odorless because it is very resistant to erosion (the taste of other metals is derived from metal ions). In addition, the density of gold is quite high, and a cubic meter of gold weighs tons. In comparison to this, lead has a density of g cm, while the densest element is osmium which has a density of g cm.

High-purity gold single crystals reflect infrared rays.

2. Chemical properties.

Gold is a transition metal that, when dissolved, can form trivalent and monovalent positive ions. Gold does not react chemically with most chemicals, but can be attacked by chlorine, fluorine, aqua regia and cyanide.

Gold can be dissolved by mercury to form amalgam (but this is not a chemical reaction); Nitric acid, which dissolves silver and alkali metals, cannot dissolve gold. The above two properties have become the basis of the first refining technology, which are respectively called "silver inquartation" and "gold and silver separation" (parting).

Experiment 2 Physical properties and certain chemical properties of metals.

Physics: colorless and odorless liquid, with a density of grams of cubic centimeters, normally, the boiling point is 100 degrees, and the state below 0 degrees Celsius is solid.

Chemistry: Chemically lazy, it can react with certain substances in the state of heating and pressurization. The pH is neutral. Ionizable.

There are no mathematical properties, only chemical properties and physical properties.

Chemical properties and physical properties are two concepts in chemistry.

There are naturally thousands of properties in mathematics and physics, but this property is not the other, and the meaning of the property is different from that in chemistry.

Physical properties: no color, no smell.

Chemical properties: inactive, non-combustible, and non-combustible.

Uses: Commonly used as protective gas.

The density of dish soap is higher than that of water, white, soluble in water, soluble in oil, emulsifying, and is a good detergent.

The density is greater than that of water, liquid, and the color is colorless and transparent.