Answer:
because that is the last group the ones before it are more reactive im sorry if this not what you were looking for.
It is known as rotation. It spins on its access while doing so
Answer:
Here is a picture of all the elements
Because the solid is soluble in water, it cannot be calcium fluoride.
This leaves us with either silver fluoride or potassium bromide, as both are soluble in water.
Upon addition of sodium sulfate, a white precipitate forms, confirming that the substance was silver fluoride as the precipitate are of silver sulfate.
Because gravity is trying to pull it down not up and when it's going down it's going with gravity not against it.
