Particles genki chapter 3

は

Identify subject

の

Connects two nouns

に

(Going to a place; destination of movement)

に

Time (number/weekday)

で

Place of action

を

Direct object

か

Question

ね

to seek agreement, confirmation, or soften a statement

よ

to add emphasis, provide new or important information, make suggestions, or give forceful commands

が

to mark the subject (especially when it's new info); or to emphasize

ごろ

approximates a specific point in time (e.g., "around 7 o'clock"),

へ

to indicate a direction or a figurative/abstract goal, often translating to "to" or "towards"; can sometimes be interchanged with the particle に (ni);