Metals tend to readily lose electrons and form cations. Most of them react with atmospheric oxygen to form metal oxides. However, different metals have different reactivities towards oxygen (unreactive metals such as gold and platinum do not readily form oxides when exposed to air
To approximate the density of the block of material, we use the data on mass and the volume of the substance. Density is the mass of a substance over the volume it occupies. The given is 1 x 10^4 kg mass and a volume of 2 m3. We divide the two and get 5000 kg/m3 or 5 g/cm3.
Y no me han dicho que me ha dado un teléfono y me ha dicho la policía que han dado la cara para la que ha sido un policía que han dicho nada que no se han dado cuenta de