Question

403. Определите валентность химических эле- ментов в соединениях: СО2, Al2O3, SO3, CaO, Na20,Р2О3 Срочно​

Answer 1

O(Оксиген )-всегда в соединениях образует 2 валентность.
CO2-C4,O2
Al2O3-Al3,O2
SO3-S6,O2
CaO-Ca2,O2
Na2O-Na1, O2
P2O3-P3, O2

Answer 2

Valence of Chemical Elements in Compounds

The valence of chemical elements in compounds refers to the number of electrons an atom can gain, lose, or share to form chemical bonds. It determines the combining capacity of an element and is crucial in understanding the formation and properties of compounds.

Here are the valences of the chemical elements in the compounds you mentioned:

1. Carbon Dioxide (CO2): - Carbon (C) has a valence of 4. - Oxygen (O) has a valence of 2. - Therefore, in carbon dioxide (CO2), carbon has a valence of 4, and each oxygen atom has a valence of 2.

2. Aluminum Oxide (Al2O3): - Aluminum (Al) has a valence of 3. - Oxygen (O) has a valence of 2. - In aluminum oxide (Al2O3), two aluminum atoms with a valence of 3 each combine with three oxygen atoms with a valence of 2 each.

3. Sulfur Trioxide (SO3): - Sulfur (S) has a valence of 6. - Oxygen (O) has a valence of 2. - In sulfur trioxide (SO3), one sulfur atom with a valence of 6 combines with three oxygen atoms with a valence of 2 each.

4. Calcium Oxide (CaO): - Calcium (Ca) has a valence of 2. - Oxygen (O) has a valence of 2. - In calcium oxide (CaO), one calcium atom with a valence of 2 combines with one oxygen atom with a valence of 2.

5. Sodium Oxide (Na2O): - Sodium (Na) has a valence of 1. - Oxygen (O) has a valence of 2. - In sodium oxide (Na2O), two sodium atoms with a valence of 1 each combine with one oxygen atom with a valence of 2.

6. Phosphorus Trioxide (P2O3): - Phosphorus (P) has a valence of 3. - Oxygen (O) has a valence of 2. - In phosphorus trioxide (P2O3), two phosphorus atoms with a valence of 3 each combine with three oxygen atoms with a valence of 2 each.

Please note that the valences mentioned above are based on the general valence rules for these elements. However, it is important to consider that valences can vary depending on the specific compound and its bonding characteristics.

I hope this helps! Let me know if you have any further questions.