Answer: The mass of given number of atoms of beryllium is

Step-by-step explanation:
Beryllium is the 4th element of the periodic table.
We know that:
Molar mass of beryllium = 9 g/mol
We are given:
Number of beryllium atoms =

According to mole concept:
number of molecules occupy 1 mole of a gas.
As,
number of beryllium atoms has a mass of 9 grams.
So,
atoms of beryllium will have a mass of =

Hence, the mass of given number of atoms of beryllium is
