Silver article generally turns black when kept in the open for many days the articles when rubbed with toothpaste again starts shining. Y do they turn black ? Name this phenomana

Silver article generally turns black when kept in the open for many da

1.	Silver article generally turns black when kept in the open for many days the articles when rubbed with toothpaste again starts shining. Y do they turn black ? Name this phenomana
Answer» Yes you can use normal toothpaste after BRUSHING your teeth with ACTIVATED charcoalpowder. ... Regular toothpaste is less abrasive, also removes surface stains, and has fluoride. PLEASE MARK MY ANSWER AS A BRAINLIEST ANSWER.