Question

Определите валентность р2s3; сu br2; nh3; n2s

Answer 1

P-3 s-2
cu-2 br-1
n-3 h-1
n-1 s-2(n2s)

Answer 2

Valence of P2S3

The valence of a compound refers to the combining capacity of an element, which is determined by the number of electrons it can gain, lose, or share to form chemical bonds.

The compound P2S3 is made up of two phosphorus (P) atoms and three sulfur (S) atoms. To determine the valence of P2S3, we need to consider the valence electrons of each element.

Phosphorus is in Group 15 of the periodic table, so it has 5 valence electrons. Sulfur is in Group 16, so it has 6 valence electrons.

In P2S3, each phosphorus atom forms three covalent bonds with sulfur atoms. This means that each phosphorus atom shares three pairs of electrons with three sulfur atoms. Therefore, the valence of P2S3 is 6.

Valence of CuBr2

CuBr2 is a compound made up of one copper (Cu) atom and two bromine (Br) atoms.

Copper is in Group 11 of the periodic table, so it has 1 valence electron. Bromine is in Group 17, so it has 7 valence electrons.

In CuBr2, the copper atom forms two covalent bonds with two bromine atoms. This means that the copper atom shares two pairs of electrons with the bromine atoms. Therefore, the valence of CuBr2 is 2.

Valence of NH3

NH3 is the chemical formula for ammonia, which is a compound made up of one nitrogen (N) atom and three hydrogen (H) atoms.

Nitrogen is in Group 15 of the periodic table, so it has 5 valence electrons. Hydrogen is in Group 1, so it has 1 valence electron.

In NH3, the nitrogen atom forms three covalent bonds with three hydrogen atoms. This means that the nitrogen atom shares three pairs of electrons with the hydrogen atoms. Therefore, the valence of NH3 is 3.

Valence of N2S

N2S is a compound made up of two nitrogen (N) atoms and one sulfur (S) atom.

Nitrogen is in Group 15 of the periodic table, so it has 5 valence electrons. Sulfur is in Group 16, so it has 6 valence electrons.

In N2S, each nitrogen atom forms one covalent bond with the sulfur atom. This means that each nitrogen atom shares one pair of electrons with the sulfur atom. Therefore, the valence of N2S is 1.

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