Question

А1.Электронная формула внешнего энергетического уровня иона Se6+: А) 4s24p4 Б) 4s24p2 В) 4s04p0 Г) 4s24p0А2.В ряду химических элементов N – P – As – Bi уменьшается:А) Радиус атомов В) Число энергетических уровнейБ) Число внешних электронов Г) Окислительная способность​

Answer 1

Ответ:

А1 - в

А2 - г

Объяснение:

Answer 2

Electron Configuration of Se6+ Ion:

The electron configuration of an ion can be determined by removing electrons from the neutral atom's electron configuration. In the case of the Se6+ ion, we need to remove six electrons from the neutral selenium atom (Se).

The electron configuration of a neutral selenium atom is 1s^2 2s^2 2p^6 3s^2 3p^6 4s^2 3d^10 4p^4.

To form the Se6+ ion, we remove six electrons from the highest energy level (n=4). Therefore, the electron configuration of the Se6+ ion is 1s^2 2s^2 2p^6 3s^2 3p^6.

So, the correct answer is А) 4s24p4 [[1]].

Decreasing Trend in the Series N – P – As – Bi:

The given series N – P – As – Bi represents the elements nitrogen (N), phosphorus (P), arsenic (As), and bismuth (Bi). The question asks about the decreasing trend in this series.

There are multiple properties that can be considered when analyzing the trend in this series. Let's examine the options provided:

A) Radius of atoms: The atomic radius generally increases as you move down a group in the periodic table. However, in this series, the atomic radius decreases from nitrogen (N) to bismuth (Bi) because of the increasing effective nuclear charge and the contraction of the inner electron shells.

B) Number of energy levels: The number of energy levels increases as you move down a group in the periodic table. In this series, the number of energy levels increases from nitrogen (N) to bismuth (Bi) because each element has an additional energy level compared to the previous one.

C) Number of outer electrons: The number of outer electrons generally increases as you move down a group in the periodic table. In this series, the number of outer electrons increases from nitrogen (N) to arsenic (As) but decreases from arsenic (As) to bismuth (Bi).

D) Oxidation ability: The oxidation ability generally decreases as you move down a group in the periodic table. In this series, the oxidation ability decreases from nitrogen (N) to bismuth (Bi) because the elements have a higher tendency to gain electrons and form negative ions.

Based on the above analysis, the correct answer is C) Number of outer electrons. The number of outer electrons increases from nitrogen (N) to arsenic (As) but decreases from arsenic (As) to bismuth (Bi) [[2]].