How many atoms of cobalt would there be in a 2.2 gram sample of cobalt

Answer : The number of atoms of cobalt are,

Explanation : Given,

Mass of cobalt sample = 2.2 g

Molar mass of Cobalt = 58.93 g/mole

First we have to calculate the moles of cobalt.

Now we have to calculate the number of atoms present in cobalt sample.

As, 1 mole of cobalt sample contains number of cobalt atoms

So, 0.0373 mole of cobalt sample contains number of cobalt atoms

Therefore, the number of atoms of cobalt are,

each chemical family is represented as a group or column on the periodic table. based on chemical properties, there are 6 types of chemical families. group 1 represents alkali metals, group 2 represents alkaline earth metals, groups 3 to 12 represent transition metals, groups 13 to 16 represent non-metals and other metals, group 17 represents halogens and group 18 represents noble gases.