Sorry if this is a silly question, and I hope my question is understood. Can someone clarify for me please, so in the case of adding images via <img src attribute, the img is the name of the attribute and the src is a value of the attribute right?
In simple terms, no.
IMG is the tagname, or element type;
src is the attribute name whose value is a source URL.
--attribute-- <img src="imageurl" alt=""> | \ \____ attribute value type attribute name