200 ml of 3 M AgNO3 and 300 ml of 2 M AgNO, are added to a solution containing 200 ml of 10 M
NaCl. The amount of NaCl left unprecipitated is
1) 46.8 g
2) 70.2 g
3) 33.4 g
4) 63.4 g​

explanation: it gains negative electrons, therefore becoming negatively charged. as charge cannot be created, nor destroyed, only transferred, this leaves the wool positive. now that they have opposite charges, the two items attract.

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

that tool would be a compass

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.