If present, it is usually given in superscript from before the element's symbol.
Please see the Periodic Table of Elements.
The atomic number is the whole # on the periodic table or the # of protons in an atom. The atomic mass is the # that is not the whole # on the periodic table, or you can multiply the mass of the isotope by its abundance and add the answers together.
The atomic mass of phosphorus on the periodic table is approximately 30.974 grams per mole.
Look at the Periodic Table.
Look in a periodic table.
periodic table
By Atomic Mass
Look on a periodic table. If you have different isotopes then you need to multiply the mass number and atomic number and then find the average of them and you'll have the average atomic mass which is the same as on the periodic table. The location of the mass number on a periodic table depends but it's normally the one with a decimal.
the atomic mass is on some periodic tables and is the decimal. for example... for carbon the atomic mass is 12.01 on my periodic table that i am looking at go to this website. http:/www.ptable.com. it should have a periodic table and the atomic mass is on the very bottom of each box. for example the atomic mass for bromine is 79.904
The atomic mass of every element is given in the box for that element in the periodic table of elements.
Answer #1 The Atomic Mass for Flourine (F) is 18.9Answer #2 If by F you mean fluoride you can find the atomic mass on any periodic table, which is 18.993
To find the atomic mass of lithium, you would look at the periodic table and find the atomic number for lithium, which is 3. The atomic mass is typically located directly below the element symbol, which for lithium is around 6.94 grams per mole.