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Some metals, namely iron, oxidize (that is the metal loses electrons) in the presence of air. This causes a chemical change to iron oxide, which is responsible for rusting.
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Why do metals often lose their shine and appear dull?
Most metals lose their luster when they are exposed to water because they react with the oxygen in the water and oxidize. An example is iron that reacts with the water to produce iron oxide, or rust.
Explain Trace metals Heavy metals Give examples?
Poisoning and disease can occur due to human exposure to trace quantities of heavy metals. Common trace metals include mercury (Hg), arsenic (Ar) and lead (Pb).
Why is wearing lewellery not recommcnded in the kitchen?
The precious metals being soft excepting platinum,would be eroded due to its exposure to physical wear and tare.
What is the term when hard biscuits become soft due to exposure to air or moisture?
It would be stale in that case.
Why pH of fresh ground water slightly decrease upon exposure to air?
It is due to absorption of CO2.
Why stools darker in color when exposed to air?
Stools darkens in color upon exposure due to colorless stercobilinogen which when exposed to air is oxidized to stercobilin
Why the pH of groundwater slightly decrease upon exposure to air?
when the groundwater is exposed to the air the carbondioxide present in the air gets dissolved in the water due to which the ph of groundwater decreases
What causes hyperthermia?
The body reaches a very high temperature due to exposure to intense heat and dehydration.
How do you make your body tanner?
go in the sun. also diet has an influence on the amount of change in pigment due to sun exposure.
Why do coins tarnish?
Tarnish means to lose the shine or lustre due to exposure to air or moisture resulting in oxidisation and discolouration. The term is often applied to coins to describe the general appearance and condition of the coin.
When you a change in the weather from one day to the next it is due to the movement of?
air masses
A silver surface becomes tarnished after exposure to air for a long period of time physical or chemical change?
Yes, it is a physical change that occurs due to a chemical process, oxygen combines with the silver to produce an oxide, the "tarnish" you see. ^Correction. It is a chemical change. Gogo gen chem hw.
