Question

Максимальное минимальное значение валентности кальция

Answer 1

Ответ:

2

Объяснение:

Возьмем оксид кальция

CaO

O всегда 2-ухвалентен => и Ca тоже двухвалентен

Answer 2

Максимальное значение валентности (или окислительной способности) кальция равно +2, что означает, что кальций способен отдавать два электрона при образовании химических соединений.

Минимальное значение валентности кальция также равно +2, так как это характеристика данного химического элемента и не может быть изменена без изменения его атомного строения.

Valence can be defined as the capacity of an atom to combine with other atoms by sharing, donating, or accepting electrons. In the case of calcium, it has a maximum valency of +2, meaning that calcium can donate two electrons when forming compounds. This is due to the electronic configuration of calcium, with an atomic number of 20 and the electron configuration [Ar] 4s2. In its neutral state, a calcium atom has two electrons in its outermost 4s shell. By donating these two electrons, calcium can achieve a stable electronic configuration similar to that of the noble gas argon. This is why calcium commonly forms compounds with a +2 charge.

The minimum valency of calcium is also +2. Unlike elements like transition metals, which can exhibit variable valencies, calcium always has a valency of +2 because it does not have any other unfilled electron shells or orbitals available for bonding. The 4s orbital is the highest energy level in calcium, and it is completely filled with two electrons. Therefore, calcium does not have the ability to lose or gain electrons beyond this valency of +2.

Overall, the maximum and minimum valency of calcium is +2, reflecting its ability to donate two electrons when forming compounds.