Question

here are four sketches of pure substances. each sketch is drawn as if a sample of the substance were under a microscope so powerful that individual atoms could be seen. decide whether each sketch shows a pure sample of an element or a pure sample of a compound. substance a substance b element compound element compound substance c substance d element compound element compound

Explanation:

Step1: Recall definitions

An element has only one - type of atom, while a compound has two or more different types of atoms chemically bonded.

Step2: Analyze Substance C

Substance C has only blue - colored atoms, so it is an element.

Step3: Analyze Substance A

Substance A has red and white atoms bonded together, so it is a compound.

Step4: Analyze Substance B

Substance B has red and gray atoms bonded together, so it is a compound.

Step5: Analyze Substance D

Substance D has green and white atoms bonded together, so it is a compound.

Answer:

Substance A: compound
Substance B: compound
Substance C: element
Substance D: compound