Question

a substance which contains various elements or compounds without bonding or in fixed proportions is a(n) ____.
○ recipe
○ element
○ formula
○ mixture
○ compound

Explanation:

To solve this, we analyze each option:

• "recipe" is for cooking, not a chemical term.
• "element" is a pure substance with one type of atom.
• "formula" represents a compound's composition, not a substance type.
• "mixture" is a combination of elements/compounds without fixed proportions or bonding (like air, salt - water).
• "compound" has elements in fixed proportions bonded together.

So the correct term is "mixture".

Answer:

D. mixture