What is the charge of the ions that halogens form when they react with metals

This element exists in adundance in the sun.explain how you would go about capturing sunlight.would this captured sunlight contain any of the element?

Each pair of clay balls represents to planetesimals if each plane test molluscum pound of the same material and is separated by the same distance which pair experiences the greatest gravitational attraction

Calculate the number of kilojoules to warm 125 g of iron from 23.5°c to 78.0°c.