Metals that occur in a free state are called native metals. These metals are found in nature as pure elements, not combined with other elements to form compounds. Their occurrence in a free state is due to their relatively low reactivity, which means they do not readily react with other elements to form compounds.

Here are some examples of metals that occur in a free state:

1. Gold (Au): Gold is a noble metal highly resistant to corrosion and chemical reactions. It is found in various forms, such as nuggets, grains, and flakes, in alluvial deposits and veins in rocks.

2. Silver (Ag): Silver, like gold, is a noble metal with high resistance to corrosion and chemical reactions. It is found in native form in veins, cracks, and fissures in rocks.

3. Copper (Cu): Copper can be found in a native state, although it is more commonly found in copper ores. Native copper is found in various geological settings, including lava flows, hydrothermal veins, and sedimentary deposits.

4. Platinum (Pt): Platinum is a valuable metal that occurs in a native state, often alloyed with other platinum-group metals such as iridium, osmium, rhodium, and palladium. Native platinum is found in placer deposits and in association with certain rock types.

5. Mercury (Hg): Mercury is the only metal that is liquid at room temperature and pressure. It is found in its native form in small droplets within cracks and crevices of rocks and in alluvial deposits.

It is important to note that while these metals can occur in a free state, they may also be found combined with other elements in ores. The occurrence of native metals is relatively rare compared to their occurrence in compound forms.