heavy metals

Which metals are called heavy metals

• with densities of 4.5 g/cm3

• elements that are located in VII A group

• elements with an atomic mass greater than 50

• alkali metals

Which toxic elements do you know?

• Na,Cu,Al,Pb

• Au,Hg,Fe,K

• Pb,Zn,Hg,Cd

• Ca,Mg,Sn,Rh

Сынап қандай табиғи қосылыстардың құрамында болады?

• киноварь (HgS)

• Каломель (Hq₂Cl₂)

• С₂H₅HgCl

• екі йодты сынап(HqІ₂)

The only metal that is liquid at room temperature

• Fe

• Au

• Hg

• Pb

As they call an alloy of metal with mercury?

• corundum

• thiocyanate

• impurities

• amalgam