Read the given paragraph and answer the following questions.

Sublimation is the process where a solid turns directly into vapor without becoming liquid, exemplified by substances like camphor and naphthalene. In contrast, deposition is gas transforming into solid, adding to the diverse ways matter changes states, including evaporation (liquid to gas), fusion/melting (solid to liquid), and condensation (gas to liquid). Additionally, elements like nitrogen, constituting 78% of Earth's atmosphere, play critical roles, such as filling bulbs to prevent oxidation, showcasing its inert nature. On the other side, metals exhibit reactivity with acids, leading to salt and hydrogen gas production. Furthermore, radioactivity showcases the instability of atomic nuclei, with types including α, β, and γ decay. Lastly, noble gases, previously considered inert, actually possess some reactivity, challenging previous notions about their chemical behavior.