Answer: The correct answer is (a)Magnesium
Explanation:
Step 1:
Calculate the number of moles of each of the samples mentioned.
a)Magnesium
n=mass/atomic mass
n=100.0/24.305
n=4.11 moles
b)Zinc
n=100.0/65.38
n=1.53 moles
c)Silver
n=100.0/107.87
n=0.93 moles
d)Calcium
n=100/40.078
n= 2.30 moles
Step 2
Find the number of atoms by multiplying no. of moles with avogadro's number
a)Magnesium
no. of atoms=4.11 * 6.022*10^23
= 2.45*10^24 atoms
b)Zinc
no. of atoms=1.53 * 6.022*10^23
= 9.21*10^23 atoms
c)Silver
no. of atoms=0.93 * 6.022*10^23
=5.60*10^23 atoms
d)Calcium
no. of atoms=2.30 * 6.022*10^23
=1.39*10^24 atoms
As pet the above calculations, sample of Magnesium contains the highest number of atoms
