Question

Знайти валентність! 1.CuF2,Ca3N2,P2O3,MN2O7

Answer 1

Cu(II)F2(I),

Ca3(II)N2(III),

P2(III)O3(II),

Mn2(VII)O7(II)

Answer 2

Valency, also known as valence, refers to the combining capacity of an element or ion. It indicates the number of bonds an atom can form to achieve a stable configuration. To determine the valency of each element in the given compounds, let's break down each compound:

1. CuF2: Cu is Copper and F is Fluorine. Copper is a transition metal, so its valency can vary depending on the compound. In this case, since it's combined with two fluorine atoms, it must have a valency of +2 to balance the charges. Thus, the valency of Cu in CuF2 is +2.

2. Ca3N2: Ca is Calcium and N is Nitrogen. Calcium is an alkaline earth metal, and it has a fixed valency of +2. Nitrogen, in this case, forms a nitride ion (N3-), which means it has a valency of -3. To balance the charges, you need three Ca atoms to combine with two N atoms. Thus, the valency of Ca in Ca3N2 is +2, and the valency of N is -3.

3. P2O3: P is Phosphorus and O is Oxygen. Phosphorus forms a trivalent ion (P3+), meaning it has a valency of +3. Oxygen usually forms divalent ions (O2-), which means it has a valency of -2. To balance the charges, two P atoms combine with three O atoms. Thus, the valency of P in P2O3 is +3, and the valency of O is -2.

4. MN2O7: M is Manganese and O is Oxygen. Manganese is also a transition metal, so its valency can vary. In this compound, the valency of Mn can be calculated by balancing the charges. The oxyanion formed here is the permanganate ion (MnO4-), where Mn has a valency of +7. Oxygen has a valency of -2 as usual. To balance the charges, two Mn atoms combine with seven O atoms. Thus, the valency of Mn in MN2O7 is +7, and the valency of O is -2.

Please note that the valency of transition metals can vary in different compounds, and it's always essential to consider the specific context of the compound when determining valency.