Genially senza titolo

Aluminum is a chemical element in the periodic table with the symbol Al and atomic number 13. It is the second element in group 13 and is placed between boron and gallium; it is found in the third period and is part of the p-block. It is the last metallic element in the third period, after sodium and magnesium.

Iron is the chemical element with atomic number 26. Its symbol is Fe, from the Latin ferrum. Iron has been known since ancient times and, due to its qualities of hardness, tenacity and resilience, its importance for humanity has marked an entire era: the so-called "Iron Age" is dated to begin at the end of the second millennium BC; only towards the end of the last century did it begin to be replaced for mechanical applications and only in part, with lighter alloys based on aluminum and magnesium.

Iron is the chemical element with atomic number 26. Its symbol is Fe, from the Latin ferrum. Iron has been known since ancient times and, due to its qualities of hardness, tenacity and resilience, its importance for humanity has marked an entire era: the so-called "Iron Age" is dated to begin at the end of the 2nd millennium BC (12th century BC); only towards the end of the last century did it begin to be replaced for mechanical applications and only in part, with lighter alloys based on aluminum and magnesium.

Oxygen is a chemical element with atomic number 8 (symbol O), the first element in group 16 of the periodic table, part of the p block. It is a highly reactive (oxidizing) nonmetallic element that readily forms oxides and other compounds with most elements.[3] By mass, it is the third most abundant element in the universe[1] after hydrogen and helium.[3] Its most abundant and most stable isotope has mass number 16.

The term zinc comes from the German Zinken, explained by the fact that the metal is placed in the oven in toothed forms. It is a light gray metal, hard, ductile, malleable and easily passivated. It is obtained by extraction from minerals such as blende and smithsoni. It is used to protect other metals from corrosion by electrodeposition. It forms alloys such as brass or certain bronzes. The oxide is used as a white pigment for paints.

Hydrogen (symbol H) is the first chemical element in the periodic table (atomic number 1) and the lightest. Hydrogen begins both the first period of the periodic system and the first group, and therefore also the s block. It is the most abundant element in the observable universe and the simplest: its most common isotope, protium, is formed by a proton, which constitutes its nucleus, and an electron.

Calcium is a chemical element with atomic number 20 and symbol Ca. It is the third element in group 2 of the periodic table, placed between magnesium and strontium; it is found in the fourth period and is part of the s-block. It is a soft, gray alkaline earth metal used as a reducing agent in the mining of thorium, uranium, and zirconium; when exposed to air, it forms a dark oxide layer.

Gold is a chemical element with atomic number 79 and its symbol is Au. It is a soft, heavy, ductile, malleable transition metal with a yellow color, due to the absorption of blue wavelengths from incident light. Unassailable by most chemical compounds, it reacts practically only with aqua regia and cyanide ion. With mercury it forms an amalgam, but not a chemical compound. It is found in its native state in the form of nuggets, grains and flakes in rocks and alluvial deposits.