4 ms·Carbon and Oxygen are not metals though, right?by 1-more 1y agoCarbon and Oxygen are not metals though, right?hollerith 1y agoAccording to the definition used by astronomers, all elements heavier than hydrogen and helium are metals.1-more 1y agofascinating!!GuB-42 1y agoA good reason for recycling centers to hate astronomers.