Define : electronegativity. Explain periodic trends in metallic and nonmetallic character.
Answers
Answer:
Metallic character refers to the level of reactivity of a metal. Metals tend to lose electrons in chemical reactions, as indicated by their low ionization energies. Within a compound, metal atoms have relatively low attraction for electrons, as indicated by their low electronegativities. By following the trend summary in the figure below, you can see that the most reactive metals would reside in the lower left portion of the periodic table. The most reactive metal is cesium, which is not found in nature as a free element. It reacts explosively with water and will ignite spontaneously in air. Francium is below cesium in the alkali metal group, but is so rare that most of its properties have never been observed.
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Answer:
Concept:
The propensity of an atom of a certain chemical substance to draw shared electrons when forming a chemical bond is known as electron affinity and is denoted by the symbol. The number of protons and the separation of the electron pairs from of the nucleus of the atom have an impact on an atom's electropositive. An atom or a chemical group will draw electrons in greater amounts the higher the associated electronegativity. The sign and amplitude of a bond's chemical polarity, which characterizes a bond along the continuum of severity from covalently to ionic bonding, can be quantitatively estimated using electron density.
Given:
Electron affinity, defined. Why do metallic and non - metallic periodic trends exist?
Find:
find the answer for the given question
Answer:
Electronegativity:
Electronegativity is the propensity of an atom in a molecule to draw the shared pair of electrons toward itself.
Because it is merely a propensity, this attribute has no dimensions. It essentially represents the final consequence of atoms' propensities to attract electron pairs that form bonds in various elements. On several scales, we quantify electronegativity. Linus Pauling created the most widely used scale.
Non-metals are much more electronegative in nature while metals are strongly good conductors of electricity. Metallurgical character rises with increasing electropositivity, and nonmetals character increases with the increase electronic configuration.
The metallic nature in the periodic table of elements grows down the group and diminishes across the interval from left to right.
Moving over a period from left to right results in a decrease in metallic quality. How quickly an electron can leave an atom determines the metallic nature. Metallic character reduces over time as the propensity to lose electrons increases.
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