#notes on elements

-- V2 O5      -- 2 vanadium      -- 5 oxygen

-- also called vanadium pentoxide

-- inorganic compound

-- molar mass is 181.88 g/mol

-- density is 3.357 g/cm^3

-- melting point is 963 K

-- boiling point is 2020 K

-- non-flammable

-- yellow solid

-- mineral form is rare

-- Fe

-- atomic number 26

-- atomic weight is 55.845

-- group 8

-- period 4

-- D-block

-- transition metal

-- electron configuration is [Ar] 3d^6 4s^2

-- metallic color

-- lustrous

-- most common element on Earth by mass

-- solid at STP

-- melting point is 1811 K

-- boiling point is 3134 K

-- density is 7.874 g/cm^3

-- four stable isotopes      -- 54-Fe      -- 56-Fe      -- 57-Fe      -- 58-Fe