How many words should be written in a chapter depended on the genre, plot, style, and other factors. Generally speaking, different types of novels had different word count requirements, but most novels needed to maintain a general rhythm of plot progression and character development. A chapter in a novel was usually between 5000-8000 words, but the exact number of words needed to be estimated according to the plot and style of the novel. If you want to improve the reading ability and attractiveness of the novel, you can try to increase the number of words, but you also need to pay attention to the length to avoid making the reader feel tired.