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this is because the metals which are in contact with air' carbon di oxide or moisture present in the air to form a layer on their surface. the formation of the=is air on the metal,s surface makes it appear dull.
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∙ 11y ago
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Why does silver look dull after sometime?
oxydization
What are the objects of dull?
unsharpened knife
Why are group 1 metals dull on the outside but shiny on the inside?
because of high alkalinity and reactivity, these metals react with oxygen (or other gases) and form a dull layer over them. The inner part remaining protected against gases look shiny, but after sometime they also become dull.
Why is it when you cut s piece of sodium metal the shiny metal soon goes dull?
because soduim turns metals dull
What element is a dull grey metal?
Many metals are "dull grey"; an example is niobium.
Why does silver look dull after sometime?
oxydization
is dull a metal or non-metal?
Lead is a metal with dull appearance. It means "yes"! Was this answer helpful?
Is dull a metal?
No. Dull is a descriptive adjective .
Is there a metal that never dulls?
Pure silver, gold, and platinum are very unreactive so they do not become dull.
What are the objects of dull?
unsharpened knife
Why are group 1 metals dull on the outside but shiny on the inside?
because of high alkalinity and reactivity, these metals react with oxygen (or other gases) and form a dull layer over them. The inner part remaining protected against gases look shiny, but after sometime they also become dull.
What are the example of dull objects?
unsharpened knife
are metal dull?
dull metals are dull obviously but other than that no
Why is it when you cut s piece of sodium metal the shiny metal soon goes dull?
because soduim turns metals dull
Why is metal lustrous and iron dull?
Iron is not beautiful but dull is an exaggerated word.
Is a metal nonmetal or metalloid dull or shiny?
It could be dull or shiny. It doesn't matter.
What element is a dull grey metal?
Many metals are "dull grey"; an example is niobium.
