Question

1. compound or element? magnesium sulfate mgso₄

compound green
element yellow
neither blue

1. which one is a compound?

oxygen green
hydrogen purple
glucose blue

1. compound or element? sulfur s

compound blue
element red
neither green

1. how many elements are in sodium thiosulfate? na₂s₂o₃

4 purple
3 yellow
7 orange

1. how many elements are in sugar? c₁₂h₂₂o₁₁

3 orange
1 pink
45 blue

1. which one is an element?

water orange
ethanol yellow
neon purple

1. compound or element? citric acid c₆h₈o₇

compound blue
element green
neither red

1. how many elements are in gold? au

1 red
2 black
3 yellow

1. how many elements are in baking soda? nahco₃

5 blue
4 yellow
6 green

1. compound or element? iron fe

compound yellow
element purple
neither green

Explanation:

Step1: Identify compound or element for 1

A compound is made of different elements chemically combined. Magnesium Sulfate ($MgSO_4$) has Mg, S, and O, so it's a compound.

Step2: Identify compound in 2

Oxygen and hydrogen are elements. Glucose ($C_6H_{12}O_6$) is a compound as it has C, H, and O elements combined.

Step3: Identify compound or element for 3

Sulfur (S) is an element as it consists of only one - type of atom.

Step4: Count elements in 4

Sodium thiosulfate ($Na_2S_2O_3$) has Na, S, and O elements, so there are 3 elements.

Step5: Count elements in 5

Sugar ($C_{12}H_{22}O_{11}$) has C, H, and O elements, so there are 3 elements.

Step6: Identify element in 6

Neon is an element as it is a single - atom substance in the periodic table.

Step7: Identify compound or element for 7

Citric Acid ($C_6H_8O_7$) is a compound as it has C, H, and O elements combined.

Step8: Count elements in 8

Gold (Au) is an element, so there is 1 element.

Step9: Count elements in 9

Baking Soda ($NaHCO_3$) has Na, H, C, and O elements, so there are 4 elements.

Step10: Identify compound or element for 10

Iron (Fe) is an element as it is a single - atom substance in the periodic table.

Answer:

1. compound green
2. glucose blue
3. element red
4. 3 yellow
5. 3 orange
6. neon purple
7. compound blue
8. 1 red
9. 4 yellow
10. element purple