Manganese (Mn) has many uses in the modern technology.
# Rhenium (Rh) is very rare and expensive.
# Technetium (Tc) is obtained only from burned nuclear fuels - also expensive, rare, radioactive.
# Bohrium (Bh) is an artificial element, radioactive, very unstable and only some atoms can be prepared.
False; practically all the chemical elements have many uses.
This situation is normal. The number of chemical elements is smaller compared to the number of chemical compounds.
Pretty sure it's the valence electrons
The answer to this question depends on which version of the periodic table you're referring to.According to IUPAC, Group 7 would consist of manganese (Mn), technetium (Tc), rhenium (Rh), and bohrium (Bh). This group does not have many uses because other than manganese, the others are either rare or synthetic. Manganese is used as an alloying material in steel and is crucial to Vitamin B1.If all of the transition metals are considered to be one group (or the old IUPAC/CAS method is used), then group 7 can refer to the halogens, or fluorine (F), chlorine (Cl), bromine (Br), Iodine (I), and Astatine (At). These elements are highly reactive and are famous for producing salts when combined with Group 1 or Alkali metals. These elements may not have many uses alone, but they have a crucial role in chemistry.
Group 1 elements, such as sodium and potassium, are used in various applications including making soap, fertilizers, and as components in alloys. Group 7 elements, such as chlorine and fluorine, are used in disinfectants, water treatment, and as components in materials like PVC and Teflon.
your TV, smart phone, car, head phones, speakers all use rare earth elements. there are many types of rare earth elements that all have different uses.
In a numbering system that uses A and B, the group number typically refers to the position or classification of elements within a periodic table or a specific set of data. For example, in the context of chemistry, group A might represent main group elements, while group B could signify transition metals. The specific meaning can vary based on the context, so it's essential to clarify the system being used.
Nitrogen, phosphorus, and arsenic are all elements found in group 15 of the periodic table. They are all nonmetals and have various industrial uses. Nitrogen and phosphorus are essential elements for life, while arsenic is toxic.
There are many uses with ammnia. It contains N,H as elements.
Buddism
your TV, smart phone, car, head phones, speakers all use rare earth elements. there are many types of rare earth elements that all have different uses.
The term abelian is most commonly encountered in group theory, where it refers to a specific type of group known as an abelian group. An abelian group, simply put, is a commutative group, meaning that when the group operation is applied to two elements of the group, the order of the elements doesn't matter.For example:Let G be a group with multiplication * or addition +. If, for any two elements a, b Є G, a*b = b*a or a + b = b + a, then we call the group abelian.There are other uses of the term abelian in other fields of math, and most of the time, the idea of commutativity is involved.The term is named after the mathematician, Niels Abel.