Allotropes of phosphorus Allotropes of phosphorus Elemental phosphorus can exist in several allotropes, the most common of which are white and red solids. Solid violet and black allotropes are also known. Gaseous phosphorus exists as diphosphorus and atomic phosphorus. White phosphorus, yellow phosphorus or simply tetraphosphorus (P) exists as molecules made up of four atoms in a tetrahedral structure. The tetrahedral arrangement results in ring strain and instability. The molecule is described as consisting of six single P–P bonds. Two different crystalline forms are known. The α form is defined as the standard state of the element, but is actually metastable under standard
Red or Black? a number, with the corresponding section being revealed to the players and the audience. The first player to have all four of their sections revealed progressed to the final round. The final game was a giant modified roulette wheel split into 36 alternately coloured sections (18 red and 18 black), awarding a £1 million prize if the player chose the correct colour. "Red or Black?" made its first millionaire in the first show, with bricklayer Nathan Hageman, from Reading, winning on red. The following night the second millionaire was made, with carer Kevin Cartwright also winning on red. Two further