If 8g of element X combines with 4g of element Y to form compound XY, what is the mass of XY? (PS, I WILL GIVE BRAINLIEST SOMEONE JUST DO THIS FOR ME W WORK PLEASE IM TAKING A TEST)

Five students had to answer the question how are elements arranged in a periodic tabledamon: i think the elements are arranged by increasing massflo: i think the elements are arranged according to their properties sienna: i think the elements are arranged by when their discovers kyle: i think the elements are arranged according to how common they areglenda: i don't agree with any of themwho is right

Elements that do not have full outer electron shells will donate, share, or take electrons from other atoms. choose the items that have the correct binary ionic formula.

Brainliesttt me asap! the below reaction can be categorized as more than one type of reaction. which reactions are these, and what are the types of reactions?