periodic table of the elements

Carbon is a fundamental element for life that we find in nature in free form. Carbon is present in all molecules of living beings

Hydrogen is a chemical element; it has symbol H and atomic number 1. It is the lightest element and, at standard conditions, is a gas of diatomic molecules with the formula H2, sometimes called dihydrogen,

Potassium is the chemical element with atomic number 19. Its symbol is K and derives from the initial of the Neo-Latin name kalium. It is a soft, silvery-white alkaline metal that occurs naturally combined with other elements in both seawater and many minerals. It oxidizes rapidly in air and is very reactive, especially with water; it closely resembles sodium in its chemical behavior. This is an easily flammable and corrosiv

Of all the metals on the periodic table, gold is without a doubt the most famous. With atomic number 79 and marked with the symbol "Au", gold is a chemical element that belongs to the metal family. In addition to its characteristic color, its use throughout history is linked to the fact that it is easily workable, conducts electricity and heat well and is resistant to corrosion.Didascalia

Mercury is a chemical element with the symbol Hg and atomic number 80. It is a heavy transition metal, having a silvery color. It is one of the few elements in the periodic table that is liquid at room temperature, along with bromine.

Carbon (from Latin carbo 'coal') is a chemical element; it has symbol C and atomic number 6. It is nonmetallic and tetravalent—meaning that its atoms are able to form up to four covalent bonds due to its valence shell exhibiting 4 electrons

Silicon is a chemical element; it has symbol Si and atomic number 14. It is a hard, brittle crystalline solid with a blue-grey metallic luster, and is a tetravalent metalloid and semiconductor. It is a member of group 14 in the periodic table: carbon is above it; and germanium, tin, lead, and flerovium are below it.

1. the chemical element of atomic number 88, a rare radioactive metal of the alkaline earth series. It was formerly used as a source of radiation for radiotherapy.

the chemical element of atomic number 22, a hard silver-grey metal of the transition series, used in strong, light, corrosion-resistant alloys.

the chemical element of atomic number 16, a yellow combustible non-metal."we should use coal which contains less sulphur"

Hydrogen is a chemical element; it has symbol H and atomic number 1. It is the lightest element and, at standard conditions, is a gas of diatomic molecules with the formula H2, sometimes called dihydrogen,

1. the chemical element of atomic number 24, a hard white metal used in stainless steel and other alloys.