Answer:
• Formula: ,Co,, Name: ,Cobalt,.
,• Formula: ,C,, Name: ,Carbon,.
,• Formula: ,Fe,, Name:, Iron,.
,• Formula: ,Au,, Name: ,Gold,.
,• Formula: ,KCl,, Name: ,Potassium chloride,.
,• Formula: ,CS2,, Name: ,Carbon disulfide,.
,• Formula: ,Si,, Name: ,Silicon,.
Explanation:
• Co is an element.
,• Carbon is an element.
,• Iron is an element.
,• Au is an element.
,• KCl is a compound with K and Cl. The name has the positive part first (Potassium) and the second part has the name of the negative part (chloride).
,• CS2 is a compound with C and 2 S. The name has the number of each element, carbon is 1 so it is just Carbon, and there are 2 sulfurs (disulfide).
,• Silicon is an element.
