Question

Найдите валентность BN, Cr2O3,HBr​

Answer 1

В 3+, N 3-, Cr 3+, O 2-, H +, Br -

Answer 2

Valence of BN, Cr2O3, HBr

The valence of an element 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.

1. BN (Boron Nitride): - The valence of boron (B) is typically +3, meaning it can lose three electrons to form a positive ion. - The valence of nitrogen (N) is typically -3, meaning it can gain three electrons to form a negative ion. - Therefore, the valence of BN is +3 for boron and -3 for nitrogen.

2. Cr2O3 (Chromium(III) Oxide): - The valence of chromium (Cr) in Cr2O3 is +3, meaning it can lose three electrons to form a positive ion. - The valence of oxygen (O) is typically -2, meaning it can gain two electrons to form a negative ion. - Therefore, the valence of Cr2O3 is +3 for chromium and -2 for oxygen.

3. HBr (Hydrogen Bromide): - The valence of hydrogen (H) is typically +1, meaning it can lose one electron to form a positive ion. - The valence of bromine (Br) is typically -1, meaning it can gain one electron to form a negative ion. - Therefore, the valence of HBr is +1 for hydrogen and -1 for bromine.

Please note that valence can vary depending on the specific compound and its chemical environment. The valences mentioned above are general guidelines for these elements in the given compounds.