وَإِذَا ٱلصُّحُفُ نُشِرَتْ
Sentence structure
The records are nominative in another coordinated condition, and نُشِرَتْ explains their being laid open.
Ayah summary
The records of deeds will be opened so that every person’s actions become manifest.
وَإِذَا — And when
Grammar: وَ coordinates the whole conditional construction with the preceding one. إِذَا is a future non-jussive temporal adverb containing conditional meaning.
ٱلصُّحُفُ — the pages
Grammar: The noun is nominative; here it is the deputy subject of an omitted passive verb explained by نُشِرَتْ.
نُشِرَتْ — are laid open
Grammar: A feminine singular perfect passive verb. The written verbal clause is explanatory and has no syntactic position.