Technically, this table does not violate the requirement for values to be atomic. However, informally, the two telephone number columns still form a "repeating group": they repeat what is conceptually the same attribute, namely a telephone number. An arbitrary and hence meaningless ordering has been introduced: why is 555-861-2025 put into the Telephone Number1 column rather than the Telephone Number2 column? There's no reason why customers could not have more than two telephone numbers, so how many Telephone Number"N" columns should there be? It is not possible to search for a telephone number without searching an arbitrary number of columns. Adding an extra telephone number may require the table to be reorganized by the addition of a new column rather than just having a new row (tuple) added. (The null value for Telephone Number2 for customer 789 is also an issue.)