Question

ПОТРІБНО СРОЧНО!!!визначте у якому ряді формули сполук розташовані за зменшенням валентності елементів а) CaH2,PH3,CH4;б)PH3,KH,CaH2;в)PH3,H2S,HCI

Answer 1

Визначте у якому ряді формули сполук розташовані за зменшенням валентності елементів:
в) PH3, H2S, HCl.

PH3 - P(III), H(I);

H2S - H(I), S(II);

HCl - H(I), Cl(I).

Answer 2

Determining the Order of Compounds by Decreasing Valency

To determine the order of compounds by decreasing valency of elements, we need to consider the valency of the elements in each compound.

a) CaH2, PH3, CH4: The valency of calcium (Ca) is 2, hydrogen (H) is 1, and phosphorus (P) is 3. Therefore, the order of compounds by decreasing valency is: PH3, CaH2, CH4.

b) PH3, KH, CaH2: The valency of potassium (K) is 1, hydrogen (H) is 1, and phosphorus (P) is 3. Therefore, the order of compounds by decreasing valency is: PH3, CaH2, KH.

c) PH3, H2S, HCl: The valency of hydrogen (H) is 1, sulfur (S) is 2, phosphorus (P) is 3, and chlorine (Cl) is 1. Therefore, the order of compounds by decreasing valency is: PH3, H2S, HCl.