The element is silicon (Si). It forms minerals like quartz and rocks such as granite.
Answer:
Cloud condensation nuclei or CCNs are small particles typically 0.2 µm, or 1/100 the size of a cloud droplet on which water vapor condenses. Water requires a non-gaseous surface to make the transition from a vapour to a liquid; this process is called condensation.
im not sure which one to answer, and i can hardly see the text.
