Chemistry, 13.07.2019 11:10 Queentdawg7177

More than two-thirds of the elements of the periodic table are classified as

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Answer from: ciaotaylor

More than two-thirds of the elements of the periodic table are classified as Metals

Explanation:

Metals are the most abundant elements of the Periodic Table and of the earth's crust: of the 118 known, 25 are non-metallic.

Metals are characterized by being good thermal and electrical conductors and having high densities. They are generally solid at room temperature (with the exception of mercury). In addition, almost all reflect the light, obtaining a very characteristic brightness.

As mentioned, metals have among their main characteristics the possibility of being good conductors of electricity because they oppose low resistance, therefore, the electric charge can easily pass through these elements. They are also excellent heat conductors because they oppose poor resistance to high temperatures.

The metals have the malleability property, this allows their forms to be modified through the application of a continuous pressure force or after a casting process.

They also have ductility as their characteristic property, this is the possibility of molding metals into thin wires or resistant wires.

Metals are also characterized by their high tenacity, that is, by being highly resistant throughout the deformation processes before they break. The tenacity of metals is due to the strong union of their molecules.

Metal elements are classified into different types:

Alkali metals. Alkaline earth metals. Transition metals: Most metals are transitional. Lanthanides: Called lantanoids or "Rare earths", they form the "elements of internal transition" next to actinides. Actinides: Metals of high atomic numbers. Transactinides: These are "super heavy" metals, which outnumber the heaviest of actinides: lawrencio (103).

Answer from: Quest

Cis the

Answer from: Quest

it can be observed without changing the identity of the object.

it depends on what substance you're talking about as well as many other factors. in quantum mechanics, the observation of particles affects the observers ability to measure certain properties. for example: you can know the velocity of a particle, but you can't know it's position; or you can know it's position, but not it's velocity. it's like trying to find out where a grain of sand is by throwing other grains of sand at it. once you find out where it is, it's been moved. it's also like trying to find an answer to the question of whether or not a tree falling in a forest makes a sound if nobody is there to hear it. paradoxically, the only way to find out is to be there and hear it.

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