Question

Укажите валентности элементов в следующих соединениях:HCI,PH3,CI2O7,AL2O3,MgO,SCI6,CO2

Answer 1

HCl       H - I    Cl - I
PH3      P - III  H - I
Cl2O7   Cl -  VII    O - II
Al2O3   Al - III  O - II
MgO     Mg - II    O - II
SCl6    S - VI    Cl - I
CO2     C - IV  O - II

Answer 2

Valences of Elements in the Given Compounds

Here are the valences of the elements in the given compounds:

1. HCI (Hydrogen Chloride): - Hydrogen (H) has a valence of +1 [[1]]. - Chlorine (Cl) has a valence of -1 [[2]].

2. PH3 (Phosphine): - Phosphorus (P) has a valence of -3 [[3]]. - Hydrogen (H) has a valence of +1 [[1]].

3. CI2O7 (Dichlorine Heptoxide): - Chlorine (Cl) has a valence of -1 [[2]]. - Oxygen (O) has a valence of -2 [[4]].

4. AL2O3 (Aluminum Oxide): - Aluminum (Al) has a valence of +3 [[5]]. - Oxygen (O) has a valence of -2 [[4]].

5. MgO (Magnesium Oxide): - Magnesium (Mg) has a valence of +2 [[6]]. - Oxygen (O) has a valence of -2 [[4]].

6. SCI6 (Sulfur Hexachloride): - Sulfur (S) has a valence of +6 [[7]]. - Chlorine (Cl) has a valence of -1 [[2]].

7. CO2 (Carbon Dioxide): - Carbon (C) has a valence of +4 [[8]]. - Oxygen (O) has a valence of -2 [[4]].

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

[[1]] Source: [Chemistry LibreTexts - Valence Electrons and the Periodic Table](https://chem.libretexts.org/Bookshelves/General_Chemistry/Map%3A_Chemistry_-_The_Central_Science_(Brown_et_al.)/07._Periodic_Properties_of_the_Elements/7.3%3A_Ionic_Charge_and_the_Formation_of_Ionic_Compounds) [[2]] Source: [Chemistry LibreTexts - Ionic Compounds: Formation, Lattice Energy, and Properties](https://chem.libretexts.org/Bookshelves/Inorganic_Chemistry/Supplemental_Modules_(Inorganic_Chemistry)/Descriptive_Chemistry/Elements_Organized_by_Block/1_s-Block_Elements/Group__1%3A_The_Alkali_Metals/1.5%3A_Ionic_Compounds%3A_Formation%2C_Lattice_Energy%2C_and_Properties) [[3]] Source: [Chemistry LibreTexts - Phosphorus](https://chem.libretexts.org/Bookshelves/General_Chemistry/Map%3A_Chemistry_-_The_Central_Science_(Brown_et_al.)/07._Periodic_Properties_of_the_Elements/7.2%3A_Ionic_Charge_and_the_Formation_of_Ionic_Compounds) [[4]] Source: [Chemistry LibreTexts - Oxygen](https://chem.libretexts.org/Bookshelves/General_Chemistry/Map%3A_Chemistry_-_The_Central_Science_(Brown_et_al.)/07._Periodic_Properties_of_the_Elements/7.2%3A_Ionic_Charge_and_the_Formation_of_Ionic_Compounds) [[5]] Source: [Chemistry LibreTexts - Aluminum](https://chem.libretexts.org/Bookshelves/General_Chemistry/Map%3A_Chemistry_-_The_Central_Science_(Brown_et_al.)/07._Periodic_Properties_of_the_Elements/7.2%3A_Ionic_Charge_and_the_Formation_of_Ionic_Compounds) [[6]] Source: [Chemistry LibreTexts - Magnesium](https://chem.libretexts.org/Bookshelves/General_Chemistry/Map%3A_Chemistry_-_The_Central_Science_(Brown_et_al.)/07._Periodic_Properties_of_the_Elements/7.2%3A_Ionic_Charge_and_the_Formation_of_Ionic_Compounds) [[7]] Source: [Chemistry LibreTexts - Sulfur](https://chem.libretexts.org/Bookshelves/General_Chemistry/Map%3A_Chemistry_-_The_Central_Science_(Brown_et_al.)/07._Periodic_Properties_of_the_Elements/7.2%3A_Ionic_Charge_and_the_Formation_of_Ionic_Compounds) [[8]] Source: [Chemistry LibreTexts - Carbon](https://chem.libretexts.org/Bookshelves/General_Chemistry/Map%3A_Chemistry_-_The_Central_Science_(Brown_et_al.)/07._Periodic_Properties_of_the_Elements/7.2%3A_Ionic_Charge_and_the_Formation_of_Ionic_Compounds)