Question

С уменьшением заряда ядра в семействе щелочных металлов * радиус атомов растет увеличивается количество электронов на внешнем уровне уменьшается количество энергетических уровней усиливаются металлические свойства ослабевают металлические свойства

Answer 1

С уменьшением заряда ядра в семействе щелочных металлов :

уменьшается количество энергетических уровней

ослабевают металлические свойства

Answer 2

Effect of Decreasing Nuclear Charge in Alkali Metals

When the nuclear charge decreases in the alkali metal family, several effects can be observed:

1. Atomic Radius Increases: - As the nuclear charge decreases, the attraction between the nucleus and the outermost electrons weakens, leading to an increase in the atomic radius. - This is due to the increased shielding effect of inner electrons, which repel the outermost electrons, causing the atomic radius to expand. - *Source:* [[1]]

2. Decrease in the Number of Electrons in the Outermost Level: - With the decrease in nuclear charge, the number of electrons in the outermost level also decreases. - This is a result of the weakened attraction between the nucleus and the outermost electrons, causing some electrons to be lost. - *Source:* [[2]]

3. Increase in the Number of Energy Levels: - The decrease in nuclear charge leads to an increase in the number of energy levels in the atom. - This is due to the reduced attraction between the nucleus and the electrons, allowing for the formation of additional energy levels. - *Source:* [[3]]

4. Weakening of Metallic Properties: - As the nuclear charge decreases, the metallic properties of the alkali metals weaken. - This is because the decrease in nuclear charge reduces the ability of the atoms to form metallic bonds and exhibit typical metallic properties. - *Source:* [[4]]

In summary, the decrease in nuclear charge in the alkali metal family results in an increase in atomic radius, a decrease in the number of electrons in the outermost level, an increase in the number of energy levels, and a weakening of metallic properties.

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