QUESTION 15 In an experiment, a student obtained the following masses for a product: 0.651 g, 0.643 g, 0.648 g, 0.609 g, and 0.646 g. What is the
percent error?
20.1%
1.90%
0.0122%
Not enough information provided to be able to determine the percent error.

answer is a

explanation:

the density(ratio between mass and volume as m/v) decreases from top to bottom in periodic table group as the size increases and nuclear charge decreases. but in periods density increases from left to right as atom size decreases and nuclear charge increases.

m=9

step-by-step explanation:

the answer for sodium is 0.186

the answer for rubidium is 0.251