The Relative Atomic Masses of many elements are not whole numbers because(i) Of the presence of impurities.(ii) They cannot be determined accurately.(iii) Of the existence of isotopes.(iv) None of these.

Differentiate among atomic number, mass number, and isotopes, and which of these distinguishes one element from another

Which statement about the isotopes of an element is correct?A. They have the same mass number.B. They have a different atomic number.C. They have the same chemical properties.D. They are located in different places in the periodic table

identify isotopes of elements and discuss their properties

Two atoms are isotopes if they havea) different atomic numbers.b) the same mass number, but different atomic numbers.c) the same number of protons and neutrons.d) the same number of electrons, but a different number of neutrons.e) the same atomic number, but a different mass number.

Why is an element's atomic mass not listed as a whole number on the periodic table?A.The mass can change depending on charge.B.The mass cannot be determined very accurately.C.It represents an average mass of all isotopes.D.It represents an average mass of all ions.