Nonmetal atoms tend to attract electrons in chemical reactions and to form acidic compounds. Two nonmetals, hydrogen and helium, make up about 99% of ordinary matter in the observable universe by mass. Five nonmetallic elements, hydrogen, carbon, nitrogen, oxygen and silicon, largely make up the Earth's crust, atmosphere, oceans and biosphere.
This line has been called the amphoteric line, the metal-nonmetal line, the metalloid line, the semimetal line, or the staircase.  [n 1] While it has also been called the Zintl border  or the Zintl line   these terms instead refer to a vertical line sometimes drawn between groups 13 and 14.
When a highly electropositive metal is combined with a highly electronegative nonmetal, the extra electrons from the metal atoms are transferred to the electron-deficient nonmetal atoms. This reaction produces metal cations and nonmetal anions, which are attracted to each other to form a salt. Common ions
Nonmetal 1 3 Ethanol: Liquid 250 750: Gasoline: Liquid 317 950: Glass: Glass 8.5 25.5 Borosilicate glass: Glass 3.3 : 9.9 matched sealing partner for tungsten, molybdenum and kovar. Glycerine: Liquid 485: Gold: Metal 14 42 Granite: Rock 35-43 105-129 Ice: Nonmetal 51 Invar: 1.2 3.6 Iron: Metal 11.8 35.4 Kapton: 20: 60 DuPont Kapton 200EN Lead ...
Phosphorus (nonmetal), atomic number 15 This block is the only one having all three types of elements: metals , nonmetals , and metalloids . The p-block elements can be described on a group-by-group basis as: group 13, the icosagens ; 14, the crystallogens ; 15, the pnictogens ; 16, the chalcogens ; 17, the halogens ; and 18, the helium group ...
The ground state energy level of the electron in a hydrogen atom is −13.6 eV, which is equivalent to an ultraviolet photon of roughly 91 nm wavelength.. The energy levels of hydrogen can be calculated fairly accurately using the Bohr model of the atom, which conceptualizes the electron as "orbiting" the proton in analogy to the Earth's orbit of the Sun.
An oxide (/ ˈ ɒ k s aɪ d /) is a chemical compound that contains at least one oxygen atom and one other element in its chemical formula. "Oxide" itself is the dianion of oxygen, an O 2– (molecular) ion. with oxygen in the oxidation state of −2.