Can iodine atoms maintain the chemical properties of matter? What about iodine molecules?

Only in a substance made up of molecules, a molecule is a particle that maintains the chemical properties of the substance.

For example, metals are made up of atoms, but the metal atoms retain the chemical properties of the metal.

Iodine is a substance in its form of I2 and is in a molecular state. Therefore, the iodine molecule determines the chemical properties.

Atoms are the smallest particles in a chemical reaction. In a chemical reaction, between the various atoms in a molecule, the old chemical bonds are broken and new chemical bonds are formed, thus forming new substances. However, in a chemical reaction, the type and number of atoms before and after the reaction are constant, so the atom is the smallest particle in the chemical reaction.

Principles of Conservation of Chemistry).

Molecules are the smallest particles that maintain the chemical properties of a substance. In a chemical reaction, the atoms in the molecule are recombined to form a molecule of a new substance, and the chemical properties are changed because the chemical bonds in the original molecule are broken, forming a molecule of the new substance. The chemical properties have changed accordingly because it is no longer the original substance.

So atoms can't keep their chemical properties.

To put it simply: what does it mean to keep the chemical properties, the molecule does not change, the chemical property does not change, the molecule changes, the chemical property changes, and it is maintained; In chemical change, the atom does not change, but the chemical properties change, it cannot be said to be maintained.

Iodine atoms cannot maintain the chemical properties of a substance, whereas an iodine molecule can maintain the chemical properties of a substance.

The smallest particle whose molecular formula retains the chemical properties of a substance.

Iodine atoms cannot, iodine molecules can, because molecules are the smallest particles that maintain the chemical properties of a substance.

No. The smallest particle in a substance made up of molecules whose molecular formula retains the chemical properties of the substance.

The relative atomic mass of iodine is 127, and the element of iodine usually exists in the form of an I2 molecule, so its relative molecular mass is 254.

Iodine is a purple-black, shiny sheet crystal with atomic number 53, and the isotope present in nature is iodine-127 with 74 neutrons. Iodine has a high vapor pressure and sublimates at slight heat.

1. The element iodine No. 53 in the periodic table of chemical elements is located in the 5-period system in the periodic table of chemical elements, and group A is one of the halogenated elements.

Elemental iodine was first discovered by the French pharmacist Cuterva.

3. Elemental iodine is purple-black crystal, easy to sublimate, and easy to condense after sublimation.

4. Toxic and corrosive. Iodine elemental will turn blue-purple when it encounters starch.

Relative atomic mass of iodine: 127

This is certainly true.

Iodine is a purple solid at room temperature and releases a purple gas. Iodine sublimation, which means that iodine is not liquid at atmospheric pressure and is directly converted from a solid to a gas. Only pressurized iodine vapor can be liquefied.

Halogens are oxidizing and gradually weaken from top to bottom.

The chemical properties of iodine are not as active as the group elements F2, Cl2 and Br2, but it can also exhibit a variety of oxidation states from -1 to +7 in chemical reactions, and its chemical properties can be summarized as follows.

Iodine is soluble in iodide because I2 and iodine ions form a wrong ion (I3).i2 + i i3 In this equilibrium, there is always elemental iodine present in the solution, so many potassium iodide solutions have the same properties as iodine solutions. Iodine molecules form blue-black miscombinations with starch, but iodine ions (i) do not.

Iodine reaction with metals:

Generally, metals that can react with chlorine (except for ***) can also react with iodine, but the reactivity is not as good as chlorine. For example, iodine can directly interact with reactive metals at room temperature, and the reaction with other metals needs to occur at higher temperatures. i 2 + 2na → 2nai.

Iodine reaction with non-metals:

Generally, non-metals that can react with chlorine can also react with iodine, because the oxidation ability of iodine is weak, and the reactivity is not as good as chlorine, so it needs to be reacted at a higher temperature. For example, it reacts with phosphorus and produces only phosphorus triiodide: 3i2 + 2p 2pi3

Iodine reaction with water:

1) Type of reaction between halogen and water: Self-redox reaction occurs in water.

2) Reaction of iodine with water: Iodine has the least solubility in water, only slightly soluble in water, and the solubility is water. i 2

It cannot undergo redox reactions with water like F2 with water. Iodine precipitation occurs when oxygen is introduced into a hydrogen iodide solution

4hi + o 2 → 2i 2 + 2h 2 o

i2 Under alkaline conditions, i2 can undergo its own redox reaction to produce iodate and iodine ions

3i 2 + 6oh → 5i + io 3 + 3h 2 o

This is due to the absence of the periodic periodic acid IO in the solutionAt any temperature, IO rapidly undergoes its own redox reaction to produce I and IO3