Scientists use significant figures in order to provide precise measurements in recorded data. A triple beam balance, units in grams with the following objects: paper clips, cone, light bulb, cube.
Diagram by Explore Learning
Which measurement would not be possible to obtain from the triple beam balance shown?
a.
558.6 g
b.
463.455 g
c.
2.4 g
d.
100.0 g

the atomic number will stay the same no matter how many electrons it has, so it doesn’t decrease nor increase. it’ll only change with a different number of protons

metals are good conductor of electricity. it has free electrons on their surface. according to electron pool theory, each atom present in a metal crystal losses all of its valence electron and as a result a pool of free is form. these pool of electrons are free to move and   conduct electricity easily   while making metal as good conductor.

the correct answer is a. the ability of electrons to flow throughout the metal.

if it's not useful, feel free to report for mistake in answer.