Question

silver articles turn black when kept in the open for a few days the article? when rubbed with toothpaste again started shining.
1 why do silver articles turn black when kept in a the open for a few days name the phenomenon involved ​

Answer 1

Answer:

ANNEYONGHASEYO CHINGU ...

SILVER ARTICLES WHEN EXPOSED TO AIR TURN BLACK BECUZ OF THE REACTION OF SILVER (Ag) WITH THE OXYGEN PRESENT IN THE AIR

THIS FORMS A LAYER SULPHUR ON THE SILVER AND IT LOOKS BLACKENED

THIS PROCESS IS CALLED AS TARNISHING .

WHEN WE RUB TOOTHPASTE ON THE ARTICLE IT TAKE OF THE LAYER OF SULPHUR THUS THE ARTICLE SHINES AGAIN

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Answer 2

Silver article turns black when kept in the air because silver reacts with sulphur compounds such as hydrogen sulphide (H2S) present in air and forms silver sulphide.