2) A certain element has the 4 isotopes. Given the following data, calculate the average atomic mass of the element and identify which element it is. Isotope % abundance Mass (amu) 1 5.80% 53.9396 2 91.72% 55.9350 3 2.20% 56.9354 4 0.28% 57.9333

4- c, because all matter stays the same no matter what. it is still there. 5- b, because matter is known as mass. 6-c because, flammability is a chemical property. malleability is changing the shape of an object.

Fine out your self ponk

Ch4 and ph3 are both covalent since they are composed both of non-metals.    ch4 is non- polar because of  london forces and has a geometry of tetrahedral  ph3 , on the other hand, is umbrella shaped polar and has dipole-dipole intermolecular force (imf) . since ph3 is polar, it has a stronger imf