Hauv kev xyaum, cov hlau tsis yog -ferrous feem ntau muab faib ua tsib pawg:
Lub teeb hlau
Nrog qhov ceev tsawg dua 4500 kg / m³ (0.53-4.5 g / cm³), lawv suav nrog txhuas, magnesium, potassium, sodium, calcium, strontium, thiab barium.
Hnyav Hlau
Nrog rau qhov ceev ntau dua 4500 kg / m³ (4.5 g / cm³), lawv suav nrog tooj liab, npib tsib xee, cobalt, txhuas, zinc, tin, antimony, bismuth, cadmium, thiab mercury.
Cov Hlau Hlau
Cov no yog cov khoom kim tshaj li cov hlau, muaj cov nplua nuj nyob hauv lub ntiaj teb pob zeb, tsis yooj yim rau purify, thiab muaj cov tshuaj lom neeg ruaj khov. Lawv suav nrog kub, nyiaj, platinum, iridium, osmium, palladium, rhodium, thiab ruthenium. Tsis tshua muaj hlau
Cov no tau muab faib ua cov hlau tsis tshua muaj xws li lithium, beryllium, rubidium, thiab cesium; tsawg refractory hlau, xws li titanium, zirconium, molybdenum, tungsten, hafnium, vanadium, niobium, tantalum, thiab rhenium; tsawg dispersed hlau, xws li gallium, indium, germanium, thiab thallium; cov hlau tsis tshua muaj hauv ntiaj teb, suav nrog scandium, yttrium, lanthanum, cerium, praseodymium, neodymium, promethium, samarium, europium, thiab gadolinium; thiab ib txwm muaj hluav taws xob hlau, suav nrog polonium, francium, radium, actinium, thorium, protactinium, uranium, neptunium, thiab plutonium.
Semimetals
Cov no muaj cov khoom nruab nrab ntawm cov hlau thiab nonmetals, suav nrog silicon, selenium, arsenic, boron, thiab tellurium.
