Question

referring to the figures below, answer question 4 and question 5.

a b c d
four figures with colored circles, a: four blue circles; b: three blue and two yellow circles; c: one yellow, four blue circles; d: five blue circles (two pairs and one single? wait, original: d has two blue pairs and one blue pair? wait, image: d has three groups? wait, ocr text for figures: a: four blue circles; b: three blue, two yellow; c: one yellow, four blue; d: five blue (maybe two pairs and one? wait, the users image: d has two blue pairs (each pair is two blue circles) and one blue pair? wait, no, the ocr text for the questions:

4 which figures represent an element? select all that apply.
a. figure a
b. figure b
c. figure c
d. figure d

1. which figure represents a compound? why?

a. figure a represents a compound because it contains particles that are the same and that are made up of 1 atom.
b. figure b represents a compound because it contains molecules that are the same and that are made up of 2 different atoms.
c. figure c represents a compound because it contains particles that are different.
d. figure d represents a compound because it contains molecules that are the same and that are made up of 2 same atoms.

1. how many oxygen(o) atoms are shown in the chemical formula al₂(so₄)₃?

a. 2
b. 3
c. 4
d. 12

Explanation:

Step1: Analyze Figure A

Figure A has 4 identical single blue circles (atoms of one element), so it's an element.

Step2: Analyze Figure B

Figure B has molecules with 1 blue + 1 yellow atom (different atoms), so it's a compound.

Step3: Analyze Figure C

Figure C has mixed particles (2-blue molecules, single blue atoms, 1-blue+1-yellow molecules), so it's a mixture.

Step4: Analyze Figure D

Figure D has 2-blue molecules (same atoms), so it's an element.

Answer:

1. a. Figure A, d. Figure D
2. b. Figure B represents a compound because it contains molecules that are the same and that are made up of 2 different atoms.