Question

Поясніть закономірність в періодах для а)зміни властивостей елемента б)змінни властивостей оксидів елементів в)зміни властивостей гідратів оксидів

Answer 1

Відповідь:

а)в періодах зліва напрво ослаблюються металічні властивості елементі і посилюються неметалічні

б) основні властивості оксидів послблюються і посилюються кислотні

Пояснення:

Answer 2

Law of Periodicity in the Elements

The law of periodicity in the elements refers to the recurring trends in the properties of elements as one moves across the periodic table. These trends can be observed in the changes in properties of elements, the properties of their oxides, and the properties of the hydrates of their oxides.

Changes in Properties of Elements

The properties of elements exhibit periodic trends as one moves across a period in the periodic table. These trends include atomic radius, ionization energy, electron affinity, and electronegativity. The general trend is that atomic radius decreases, ionization energy increases, electron affinity increases, and electronegativity increases as one moves from left to right across a period.

Changes in Properties of Oxides of Elements

The properties of oxides of elements also exhibit periodic trends. For example, the nature of oxides changes from basic to acidic as one moves from left to right across a period. This trend is known as the oxide basicity trend. Additionally, the acidic character of oxides generally increases from left to right across a period.

Changes in Properties of Hydrates of Oxides

The properties of hydrates of oxides also follow periodic trends. The formation of hydrates is often accompanied by the absorption of water, and the properties of hydrates can vary based on the number of water molecules associated with the oxide. As one moves across a period, the tendency to form hydrates and the nature of hydrates can exhibit periodic behavior.

These trends in the properties of elements, their oxides, and the hydrates of their oxides are fundamental to understanding the periodic nature of the elements and their compounds.

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