Article 1 talked about the Legislative Department
Section 1- Legislative power of Congress
Section 2- House of Representatives
Section 3- Senate
Section 4- Elections and Meeting
Section 5- Legislative Proceedings
Section 6- Compensation,Immunities and Disabilities of Members
Section 7- Revenue Bills and President Veto
Section 8- Powers of Congress
Section 9- Powers Denied to Congress
Section 10- Powers Denied to the States