Here's why:
* Atomic number 1 refers to the element hydrogen (H).
* Freshly generated implies that the hydrogen atoms are newly formed and haven't yet had a chance to bond with other atoms.
* Reactive form means that the hydrogen atoms are highly reactive, meaning they readily participate in chemical reactions.
Nascent hydrogen is a highly reactive species that is often generated in situ (within the reaction mixture) by the reduction of protons (H+). It is not a stable species and quickly reacts with other molecules or atoms. This high reactivity makes nascent hydrogen a powerful reducing agent and useful in various chemical reactions.