Palladium is used in catalytic converters in cars to reduce pollution. Cadmium is used in rechargeable batteries. Indium is used in electronic devices, such as diodes. Tellurium is used in solar cells and light detectors. Iodine is very active and kills germs.
Xenon is an inert gas used in bright lighthouse lamps.
Cesium is the softest metal. It has the largest atoms. Cesium atoms are used in extremely accurate atomic clocks. Barium absorbs X-rays. It is used in a liquid swallowed by patients before getting a stomach X-ray.