Properties change within a Row (or period) as the number of valence electrons in the outer shell increase
Answer:
Absolute error 
% Error
5
Explanation:
The absolute error is the the difference in the measured value and the actual value of a quantity.
Here the actual value is
grams
The measured value is
grams
Absolute error

Percent error

Where AE stands for absolute error and AV stands for absolute value.

%
Answer:
I'm so sorry if this is wrong but I think its B