The atomic masses of the two stable isotopes of copper 63cu29 (69.17 percent) and 65cu29 (30.83 percent)â are 62.929599 and 64.927793 amu, respectively. calculate the average atomic mass of copper.

Average atomic mass of copper is 63.545642 amu

Explanation:

100 atoms of copper contains 69.17 number of atoms and 30.83 number of atoms.

Therefore average atomic mass of copper is given by-

=

=63.545642 amu

indicate valleys, hills, steepness and gentleness of slopes.

explanation:

contour lines on a map indicate elevation, or depth. numeric notations on contour lines refer to the level of elevation, or height about sea level.

the correct option is c.

isotopes refers to different forms of the same element with the same atomic number but different mass number as a result of difference in their neutron numbers. isotopes have different relative atomic mass but share the same chemical properties.