Apenny weighs 250 centigrams. how may grams is this ?

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

Which statement best describes the oxidation numbers of the atoms found in magnesium chloride? a. magnesium has a 2- oxidation number and chlorine has a 1+ oxidation number. b. magnesium has a 2- oxidation number and chlorine has a 2+ oxidation number. c. magnesium has a 2+ oxidation number and chlorine has a 1- oxidation number. d. magnesium has a 1+ oxidation number and chlorine has a 1- oxidation number.

What does x represent in the formula for the compound xcl4?