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Because iodine sublimates, as do the other solid halogens. That means they go from solid to gas without becoming a liquid first.

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14y ago
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5mo ago

Iodine sublimes when heated, which means it changes from a solid to a gas without passing through a liquid phase. The purple color is due to the presence of iodine vapor, which absorbs certain wavelengths of light and reflects others, resulting in the purple color seen.

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Q: Why does iodine emit a purple gas when heated?
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Related questions

What is a solid purple-black non metal which changes to a deep purple gas when heated?

Iodine is a solid purple-black non-metal element that can sublimate directly from a solid to a gas when heated, producing a deep purple vapor.


What gas is produced when iodine are heated?

When iodine is heated, it sublimes directly from a solid to a purple gas. The gas produced is diatomic iodine molecules (I2).


What is the purple gas which fills the test tube when heating an iodine?

The purple gas formed when heating solid iodine in a test tube is iodine vapor. Iodine sublimes directly from a solid to a gas when heated, turning into a purple gas that condenses back into solid iodine crystals when cooled.


What do you call the purple gas that fills the test tube when a few crystals of iodine is being heated inside a test tube?

The purple gas that forms when heating iodine crystals is called iodine vapor.


How does a solid iodine change when it is heated?

Solid iodine sublimes directly into a purple-red gas when heated, without passing through a liquid phase. The purple-red gas will turn back into solid iodine upon cooling.


What are the names of the three states of iodine?

The three states of iodine are solid, liquid, and gas. At room temperature, iodine is a solid with a dark purple color. When heated, it sublimes directly from a solid to a purple-violet gas.


What grey solid turns into a purple gas upon heating?

Solid iodine turns into purple iodine gas when heated.


What do you call the purple gas that fills the test tube when a few crystal of iodine is being heated inside a test tube?

This is also iodine, as a gas.


What state is the iodine in when it is heated?

When iodine is heated, it sublimes from a solid state directly into a purple-colored gas. It undergoes sublimation, which means it changes from a solid to a gas without passing through the liquid state.


What is the correct colour for iodine gas?

Iodine gas is a purple or violet color.


A gas heated to millions of degrees would emit?

A gas heated to millions of degrees would emit X-rays.


What state is iodine at room temperature?

Iodine is a solid at room temperature. It sublimes into a purple gas when heated.