Can anyone tell me the equivalent mass & atomic mass of all the elements?

Answer 1

look up the periodic table...duh

Answer 2

The atomic mass can be found on the periodic table (these masses are weighted averages of all the isotopes known for the element in question). The equivalent mass would be the atomic mass divided by its valence number, for instance, Ca (calcium) has an atomic mass of 40.078 and a valence of +2. Thus its equivalent mass would be 40.078/2 = 20.039. In a compound, equivalence would be determined by dividing the formula mass by the sum of the valences of its cations.

Answer 3

Equivalent weight is the atomic weight of an element or radical divided by the valence it assumes in a chemical compound.

For example, hydrogen, with atomic weight 1.008 and valence 1, has an equivalent weight of 1.008. Oxygen assumes a valence of 2 and has an atomic weight of 15.9994, so it has an equivalent weight of 7.9997.

Elements may assume different equivalent weights in different compounds. For example, iron (atomic weight 55.845) assumes equivalent weight 27.9225 if it is valence 2 in the compound (ferrous); or 18.615 if it is valence 3 (ferric).

The equivalent weight can also be computed for other than pure elements. For example, the carbonate radical (CO3) has a formula (atomic) weight of 60.0092 and assumes valence 2 in compounds, so its equivalent weight is 30.0046.

The equivalent weight of a substance may be defined as that weight of it which will react with or produce one mole of hydrogen. (Or 1g of H since 1mol H=1g H)

For details see the following link.
http://columbia.thefreedictionary.com/equivalent+weight

Answer 4

http://periodic.lanl.gov/default.htm