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A common unit of measurement for water’s density is gram per milliliter (1 g/ml) or 1 gram per cubic centimeter (1 g/cm3).
Density is the mass of an object divided by its volume. Density often has units of grams per cubic centimeter (g/cm3). Remember, grams is a mass and cubic centimeters is a volume (the same volume as 1 milliliter).
Aluminium has a density of 2.7 grams per cubic centimeter, that is, 2.7 g/cm3 or 2.7 g cm-3.
Preparation and General Properties of the Group 13 Elements
|density (g/cm 3) at 25°C||2.34||5.91|
|atomic radius (pm)||87||136|
|first ionization energy (kJ/mol)||801||579|
|most common oxidation state||+3||+3|
Group 13 is called the boron group, and boron is the only metalloid in this group. Tellurium is the only metalloid in this group, which also contains three nonmetals and one metal.
Group 3 is the first group of transition metals in the periodic table. The group is also called the scandium group or scandium family after its lightest member.
Tin melts very low in temperature. Basically, the lowest melting point of any useful, non-toxic metal(*). It melts around 500 degrees, is very castable, and looks brilliant. There’s only one real good reason not to use it: it’s relatively expensive.
Zinc is a good metal for a kid to use for casting. It’s easily available at a scrap metal dealer (at least it used to be) for next to nothing. It melts at a low enough temperature that you can melt it on the stove, with effort, or with a propane torch. And it’s quite non-toxic, certainly far less toxic than lead.
Due to the high melting point of aluminum alloy die castings widely used today, most castings can only be produced on cold chamber die casting machines.
8 Key Metals Used in Casting