Question

Валентность каких элементов не совпадает с номером группы а)F б)S в)O г)NA д)C ?

Answer 1

Кислорода не совпадает

Answer 2

Valency of Elements

The valency of an element is the number of hydrogen atoms that can combine with or replace in a chemical compound. Let's examine the valency of the given elements and see which ones do not match the number of their group.

a) F (Fluorine) Fluorine is in group 17 of the periodic table, also known as the halogens. Its valency is typically -1, which does not match its group number.

b) S (Sulfur) Sulfur is in group 16 of the periodic table. Its valency can vary, but it is commonly -2, which does not match its group number.

c) O (Oxygen) Oxygen is in group 16 of the periodic table, and its valency is typically -2, which does not match its group number.

d) Na (Sodium) Sodium is in group 1 of the periodic table, and its valency is typically +1, which matches its group number.

e) C (Carbon) Carbon is in group 14 of the periodic table. Its valency can vary, but it commonly shows a valency of +4 or -4, which does not match its group number.

In summary, the valency of elements F, S, and O does not match their group numbers, while the valency of Na and C does not match their group numbers.