Hydrogen and Halogens Differences
The difference between hydrogen and halogen
Hydrogen is the first element, the halogen family, including fluorine, chlorine, bromine, iodine, etc. The properties of the two are quite different.
Hydrogen is a colorless and odorless gas, light in weight, flammable in air, and produces a light blue flame when burned, and the product is only water. Its atoms have only one electron, and in order to achieve a stable structure, they either lose one electron to form a cation, or gain one electron to form an anion, but lose electrons is difficult, because their nuclear charge is small, and they attract electrons weakly; it is not easy to obtain electrons, covering them with only one layer of electrons, and their ability to hold electrons is limited.
As for halogens, they are all non-metallic elements. Fluorine is a yellowish gas, chlorine is a yellowish-green gas, bromine is a dark reddish-brown liquid, and iodine is a purplish-black solid. The outermost layer of halogen atoms has seven electrons, and it is easy to obtain a stable structure of one electron, so its oxidation is strong. The reactivity of its elemental substances gradually weakens according to the order of fluorine, chlorine, bromine, and iodine.
The state of hydrogen and halogen combination is also different. Hydrogen and halogen combine to form hydrogen halides, such as hydrogen chloride, hydrogen bromide, etc. In such compounds, hydrogen shows + 1 valence, and halogen shows -1 valence. However, the chemical properties of the two are different, and substitution reactions can occur between halogen elementals. For example, chlorine can replace bromine in potassium bromide solution, while hydrogen elemental substances usually do not
Furthermore, the physical properties of the two are also unique. The boiling point and melting point of hydrogen are extremely low, making it difficult to liquefy; the melting boiling point of halogen rises gradually with the increase of atomic number, and the state at room temperature is from gas to liquid to solid.
From this perspective, the chemical and physical properties of hydrogen and halogen are significantly different, which cannot be ignored.
Hydrogen is the first element, the halogen family, including fluorine, chlorine, bromine, iodine, etc. The properties of the two are quite different.
Hydrogen is a colorless and odorless gas, light in weight, flammable in air, and produces a light blue flame when burned, and the product is only water. Its atoms have only one electron, and in order to achieve a stable structure, they either lose one electron to form a cation, or gain one electron to form an anion, but lose electrons is difficult, because their nuclear charge is small, and they attract electrons weakly; it is not easy to obtain electrons, covering them with only one layer of electrons, and their ability to hold electrons is limited.
As for halogens, they are all non-metallic elements. Fluorine is a yellowish gas, chlorine is a yellowish-green gas, bromine is a dark reddish-brown liquid, and iodine is a purplish-black solid. The outermost layer of halogen atoms has seven electrons, and it is easy to obtain a stable structure of one electron, so its oxidation is strong. The reactivity of its elemental substances gradually weakens according to the order of fluorine, chlorine, bromine, and iodine.
The state of hydrogen and halogen combination is also different. Hydrogen and halogen combine to form hydrogen halides, such as hydrogen chloride, hydrogen bromide, etc. In such compounds, hydrogen shows + 1 valence, and halogen shows -1 valence. However, the chemical properties of the two are different, and substitution reactions can occur between halogen elementals. For example, chlorine can replace bromine in potassium bromide solution, while hydrogen elemental substances usually do not
Furthermore, the physical properties of the two are also unique. The boiling point and melting point of hydrogen are extremely low, making it difficult to liquefy; the melting boiling point of halogen rises gradually with the increase of atomic number, and the state at room temperature is from gas to liquid to solid.
From this perspective, the chemical and physical properties of hydrogen and halogen are significantly different, which cannot be ignored.

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