If a sample of pure cadmium has a mass of 18.2 grams, how many moles of cadmium are in the sample?

Atomic mass cadmium = 112.41 amu

1 mole Cd 112.41 g
?? moles Cd 18.2 g

18.2 x 1 / 112.41 => 0.161 moles of Cd

hope this helps!

If a hydrogen atom is neutral, it must also have  one electron. an oxygen atom (o) has an atomic number of eight (8). this means a neutral oxygen atom has eight protons and eight electrons. the element actium (ac) has an atomic number of 89, so it has 89 protons and 89 electrons in a neutral atom