Question

What is the chemical formula for the compound formed between potassium and fluorine? What is the chemical formula for the compound formed between potassium and sulfur?

Answer 1

potassium has chemical forumula K
and its valency is 1, which can give 1 electron to complete its octet
flurine has chemical forumula F
and its valency is 1, which require 1 electron to complete its octet

so, K form compound with F in which K give 1 electron and F accept it
which has chemical forumula as KF
and known as potassiumfluride

potassium has chemical forumula K
and its valency is 1, which can give 1 electron to complete its octet
sulfur has chemical forumula S
and its valency is 2, which require 2 electron to complete its octet

so, K form compound with S in which 2K give 2 electron and S accept it to complete its octet
which has chemical forumula as K2S
and known as potassiumsulfide