Please Answer Correctly If correct I will mark brainliest

This is fill in the blank, not multiple choice.
QUESTION:

r is measured from the of an object.

Theoretically, which metal should be the most reactive? hydrogen lithium francium fluorine

How many moles are in 250 grams of tungsten (w)? * 4.4x10^23 moles 4.2x10^23 moles 0.7 moles 1.4 moles

Sulfuric acid (a component of acid rain) reacts with limestone (calcium carbonate) to produce calcium sulfate and carbon dioxide. this damages buildings and statues made of limestone. which solution of sulfuric acid will damage these structures more quickly? a. 0.001% b. 0.005% c. 0.010% d. 0.015%