Lithium phosphide (three lithium atoms with one phosphorus atom)has a chemical formula of Li_(3)P. If you look at the total atomic mass of Li_(3)P does Jithium or phosphor Scroll More b more of it is impossible to tell they are exactly the same phosphorus lithium

To determine which element contributes more to the total atomic mass of lithium phosphide ($Li_{3}P$), we need to compare the atomic masses of lithium (Li) and phosphorus (P).<br /><br />The atomic mass of lithium (Li) is approximately 6.94 atomic mass units (amu), while the atomic mass of phosphorus (P) is approximately 30.97 amu.<br /><br />Since there are three lithium atoms in the chemical formula of lithium phosphide ($Li_{3}P$), the total atomic mass contributed by lithium is 3 times the atomic mass of a single lithium atom, which is 3 * 6.94 = 20.82 amu.<br /><br />The atomic mass of phosphorus (P) is 30.97 amu.<br /><br />Comparing the total atomic masses, we can see that the atomic mass of phosphorus (30.97 amu) is greater than the total atomic mass contributed by lithium (20.82 amu).<br /><br />Therefore, phosphorus contributes more to the total atomic mass of lithium phosphide ($Li_{3}P$) than lithium.