Chlorine in ambient temperature is a nonmetal gas with a disagreeable odor. It's an element that has an atomic number of 17, it is a halogen because it is part of group VIIA of the periodic table. It has a big reactivity so we can find many compounds that contain this element.
This element can form compounds that are very ionic with other metals such sodium (Na), potassium (K), etc. resulting in NaCl, KCl, and others.
When chlorine gas (Cl2) reacts with water, we obtain acids (HClO and HCl), and when it reacts at the boiling temperature of water, forms hydrochloric acid and oxygen gas.
Chlorine reacting with oxygen forms acid oxides (acid oxides are formed by the reaction between a nonmetal and oxygen). From acid oxides, we can obtain other compounds that are oxidants reacting with alkali metals such NaClO or NaClO2, etc.
Other compounds that exist are acids. Chlorine reacted with hydrogen and produced HCl which is a strong acid, for example.
There are reactions between chlorine and other halogens (elements of the group VIIA) that are called interhalogens, such as ClF, ClF3, etc.
Chlorine can react with metals, forming metal chlorides, for example, NaCl, FeCl2, PbCl2, and others.