Answer:
92
Step-by-step explanation:
To estimate the difference between the standard atomic weights of these two metals we round up the given weights to the nearest whole number
The standard atomic weight for aluminum is 26.98.
To the nearest the whole number = 27
The standard atomic weight for tin is 118.71
To the nearest whole number = 119
Hence,
The estimated difference = 119 - 27
= 92
