We use a feature of your web browser called a cookie to help you get the most out of using our site. For example, we can use the cookie to recognise you and complete your username or email address and securely retrieve your shopping details if you move to different parts of the Sainsbury's website.We recommend that you enable cookies and turn on JavaScript in your web browser before using the site.Please see your internet browser help section for information on how to do this, or if you are at work, please contact your IT support team. Once you have done so, please click on Continue below.Continue.e recommend that you enable cookies and turn on JavaScript in your web browser before using the site. Please see your internet browser help section for information on how to do this, or if you are at work, please contact your IT support team. Once you have done so, please click on Continue below. Continue.
Magnesium (pronounced /maegËniËziÉm/) mÃ¦gËniËziÉm is a chemical element with the Symbol, mg atomic number, 12 atomic weight.24 3050 and common oxidation +number. 2
3.09%. Therefore, the atomic weight of silicon is. (27.977)(0.9221) + (28.976)(0.0470) + (29.974)(0.0309). = 28.086 amu. It is important to note that if we were to pick out a silicon atom at random and measure its mass, it would have a mass of either 27.977 amu, 28.976 amu or 29.974 amu, not 28.086 amu.owever, if you were to measure the masses of a billion silicon atoms (a quantity probably to tiny to see with the naked eye) individually and calculate the average mass you would find the average mass of a silicon atom is 28.086 amu. Molecular Weight.