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Which one of the following properties of alkali metals increases in magnitude as the atomic number rises ? [1989]
- a)Ionic radius
- b)Melting point
- c)Electronegativity
- d)First ionization energy.
Correct answer is option 'A'. Can you explain this answer?
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Which one of the following properties of alkali metals increases in ma...
Within a group, ionic radius increases with increase in atomic number. The melting points decrease down the group due to weakning of metallic bond. The electronegativity and the 1st ionization energy also decreases down the group.
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Which one of the following properties of alkali metals increases in ma...
Alkali metals are a group of elements in the periodic table that includes lithium, sodium, potassium, rubidium, cesium, and francium. These elements have similar properties, such as low electronegativity, high reactivity, and the tendency to lose one electron to form a univalent cation. Among the properties of alkali metals, the ionic radius increases in magnitude as the atomic number rises.
Explanation:
Ionic radius is the size of an ion, which is determined by the number of electrons and protons in the ion. In the case of alkali metals, the valence electron is located in the outermost shell, which means that the ionic radius depends on the size of the outermost shell. As the atomic number increases in the group, the number of electrons and protons also increases, which results in a larger size of the outermost shell. Therefore, the ionic radius increases in magnitude as the atomic number rises.
This trend can be observed in the periodic table by comparing the ionic radii of lithium, sodium, potassium, rubidium, cesium, and francium. The ionic radius increases from lithium to francium due to the increasing number of electrons and protons in the outermost shell.
In summary, the ionic radius of alkali metals increases in magnitude as the atomic number rises. This trend is due to the increasing size of the outermost shell as the number of electrons and protons increases.
Explanation:
Ionic radius is the size of an ion, which is determined by the number of electrons and protons in the ion. In the case of alkali metals, the valence electron is located in the outermost shell, which means that the ionic radius depends on the size of the outermost shell. As the atomic number increases in the group, the number of electrons and protons also increases, which results in a larger size of the outermost shell. Therefore, the ionic radius increases in magnitude as the atomic number rises.
This trend can be observed in the periodic table by comparing the ionic radii of lithium, sodium, potassium, rubidium, cesium, and francium. The ionic radius increases from lithium to francium due to the increasing number of electrons and protons in the outermost shell.
In summary, the ionic radius of alkali metals increases in magnitude as the atomic number rises. This trend is due to the increasing size of the outermost shell as the number of electrons and protons increases.
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Which one of the following properties of alkali metals increases in magnitude as the atomic number rises ? [1989]a)Ionic radiusb)Melting pointc)Electronegativityd)First ionization energy.Correct answer is option 'A'. Can you explain this answer?
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