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Different elements all have very different properties. However, you can define an element as a substance with only one type of atom in (e.g. only sulphur atoms). If a substance has more than one type of atom in, then it is either a compound or a mixture, depending on whether the elements have bonded.
Two chemical properties of sodium: - Sodium is a rather soft metal that can get oxidized if exposed to oxygen, therefore one chemical property of it is that it can be oxidized. - Another property, more popularly recognized than the previous one, is that sodium reacts readily with water to create hydrogen gas in an exothermic reaction.
A solid is a semiconductor if it is an insulator at low temperatures (e.g. T < 40 K for silicon) and is a conductor at higher temperature. Its energy band has a forbidden gap where charge carrier cannot occupy. At low temperatures, the probability of a charge carrier having enough energy to be freely roaming in the solid is about nil. That probability increases with temperature. One reminder, an intrinsic semiconductor (~ pure) is charge-neutral (positive charge is exactly balanced with negative charge) at all temperatures. Hence, a "pure" semiconductor is quite useless. However, when we introduce foreign atoms into the material (e.g. arsenic atoms in silicon), the doped semiconductor is very useful indeed. The useful solids created the modern electronics industry -- semiconductors have mostly replaced vacuum tubes as the technology of choice in electronic devices. Nowadays, it is hard to find a radio, TV, cellular phone, GPS, calculator, computer, etc. without an integrated circuit in it.
to use it u need a consolestep.1 right click halo and go to propites then on target go all the way to the end and space bar -consolestep.2 click apply and okstep.3 make a server and make it anykindwhen ur in the game click on , its but the 1 then type in one if these'u wantEffect codeToggle instant deaths for enemies that see playercheat_medusa Set game speedgame_speed Clear console windowclsToggle unlimited ammunition and no overheating for human weapons and plasma weaponscheat_bottomless_clipUnlimited ammunitioncheat_infinite_ammoSuper jumpscheat_super_jump Possess touched charactercheat_bump_possessionInvincibilitycheat_deathless_playerActive camouflage until shot, quit, or level endscheat_active_camouflageSpawn Warthogcheat_spawn_warthogSpawn all power-upscheat_all_powerupsSpawn all vehiclescheat_all_vehiclesSpawn all weaponscheat_all_weaponsTeleport player to current camera positioncheat_teleport_to_cameraSave current camera locationdebug_camera_saveGo to saved camera location, away from playerdebug_camera_loadList player names and numbers on serversv_playersBan indicated player from serversv_ban Kick indicated player from serversv_kick Send message as **SERVER** user name1sv_sayQuit gameif it work u welcomequit