Hi, Sol. According to the periodic table published by Sargent-Welch Scientific Company, the density of silver is 10.5 grams per cubic centimeter (water has a density of one gram per cubic centimeter.)
Even water is toxic in amounts large enough to drown in. We cannot live without iron, copper, zinc and manganese. Their respective densities are: 7.86, 8.96, 7.14 and 7.43 grams per cubic centimeter. So they are all heavy metals according to the definition you mention. Best regards, Matthew
