Superficial destruction of a surface by friction, pressure, ulceration, or trauma. The wearing away of a tooth by chemical or abrasive action. Also called odontolysis. erosion. The gradual wearing away of land surface materials, especially rocks, sediments, and soils, by the action of water, wind, or a glacier.
In chemistry, the molar mass M is a physical property defined as the mass of a given substance (chemical element or chemical compound) divided by its amount of substance. The base SI unit for molar mass is kg / mol.
  Molar mass is defined as mass of one mole of the substance. silicon molar mass is 28.09g/mol. i.e when u weigh one mole of silicon atoms, u will be getting 28.09g.Thi â¦ s molar mass concept will be very useful in calculations of concentration which needs the number of moles. 1 person found this useful.nswer   Silicon's atomic number is 14 so it has 14 electrons. There are 2 on the first shell 8 on the second shell and 4 on the outer most shell.   There are four val â¦ ance electrons in a silicon atom. 11 people found this useful.