Diatomic molecules are molecules composed of only two atoms, of the same or different chemical elements.The prefix di-is of Greek origin, meaning “two”. If a diatomic molecule consists of two atoms of the same element, such as hydrogen (H 2) or oxygen (O 2), then it is said to be homonuclear.Otherwise, if a diatomic molecule …

The chemical element hydrogen is classed as a nonmetal. It can become metallic at very high pressures. It was discovered in 1766 by Henry Cavendish.

Bromine: Bromine (Br), chemical element, a deep red, noxious liquid, and a member of the halogen elements, or Group 17 (Group VIIa) of the periodic table. atomic number 35 atomic weight 79.909 melting point −7.2 °C (19 °F) boiling point 59 °C (138 °F) specific gravity 3.12 at 20 °C (68 °F) oxidation states

1. Any free (unattached) element with no charge has the oxidation state of zero. Diatomic gases such as O2 and H2 are also in this category.. 2. All compounds have a net oxidation state of zero.

Oxygen: Oxygen (O), nonmetallic chemical element of Group 16 (VIa, or the oxygen group) of the periodic table. Oxygen is a colourless, odourless, tasteless gas essential to living organisms, being taken up by s, which convert it to carbon dioxide; plants, in turn, utilize carbon dioxide as a source

What is a compound? How is a compound different from an element? How is a mixture of elements different from a compound? What does the position of an element on the Periodic Table tell us about its properties?

In chemistry, a nonmetal (or non-metal) is a chemical element that mostly lacks metallic attributes. Physically, nonmetals tend to have relatively low melting and boiling points, and densities, are mostly brittle if solid, and are usually poor conductors of heat and electricity; chemically, they tend to have relatively high ionization energy, electron …

The chemical element oxygen is classed as a chalcogen gas and a nonmetal. It was discovered in 1774 by Joseph Priestley and and two years earlier, but …

gas (găs) n. pl. gas·es or gas·ses 1. a. The state of matter distinguished from the solid and liquid states by relatively low density and viscosity, relatively great expansion and contraction with changes in pressure and temperature, the ability to diffuse readily, and the spontaneous tendency to become distributed uniformly throughout any container

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