Question

part 3: match each diagram with its correct description. diagrams will be used once.

1. pure element - only one type of atom present.
2. mixture of two elements - two types of uncombined atoms present.
3. pure compound - only one type of compound present.
4. mixture of two compounds - two types of compounds present.
5. mixture of a compound and an element.

part 4: column a lists a substance. in column b, list whether the substance is an element (e), a compound (c), a heterogeneous mixture (hm), or a solution (s). (remember a solution is a homogeneous mixture.) in column c, list two physical properties of the substance.
column a

1. summer sausage
2. steam
3. salt water
4. pencil lead (pb)
5. dirt
6. pepsi
7. silver (ag)
8. toothpaste (na₂hpo₄)
9. a burrito
10. italian dressing
11. chicken soup
12. lemonade

Explanation:

Step1: Identify substance types

Summer Sausage is a heterogeneous mixture (HM) as it has visible different components. Its physical properties could be texture (meaty and grainy) and color (variegated).

Step2: Analyze steam

Steam is water in gaseous state, a compound (C). Its physical properties are density (less - dense than liquid water) and boiling point (100°C at standard pressure).

Step3: Evaluate salt water

Salt water is a solution (S), a homogeneous mixture. Its physical properties are conductivity (due to ions) and density (higher than pure water).

Step4: Consider pencil lead

Pencil lead is graphite, an element (E). Its physical properties are softness (used for writing) and luster (metallic - like sheen).

Step5: Examine dirt

Dirt is a heterogeneous mixture (HM). Its physical properties are color (varies), and particle size (ranges from fine to coarse).

Step6: Look at Pepsi

Pepsi is a solution (S). Its physical properties are color (dark - brown) and carbonation (bubbliness).

Step7: Analyze silver

Silver (Ag) is an element (E). Its physical properties are luster (shiny) and malleability.

Step8: Consider toothpaste

Toothpaste with $Na_2HPO_4$ is a compound (C). Its physical properties are viscosity and color (usually white).

Step9: Evaluate a burrito

A burrito is a heterogeneous mixture (HM). Its physical properties are texture (soft tortilla, various fillings) and smell (aromatic).

Step10: Examine Italian dressing

Italian dressing is a heterogeneous mixture (HM). Its physical properties are color (variegated with oil and vinegar separation) and smell (herby).

Step11: Analyze chicken soup

Chicken soup is a heterogeneous mixture (HM). Its physical properties are color (varies with ingredients) and texture (savory with chunks).

Step12: Consider lemonade

Lemonade is a solution (S). Its physical properties are color (yellowish) and taste (sweet - sour).

Answer:

Column A	Column B	Column C
2. Steam	C	Density, Boiling Point
3. Salt Water	S	Conductivity, Density
4. Pencil lead (Pb)	E	Softness, Luster
5. Dirt	HM	Color, Particle Size
6. Pepsi	S	Color, Carbonation
7. Silver (Ag)	E	Luster, Malleability
8. Toothpaste ($Na_2HPO_4$)	C	Viscosity, Color
9. A burrito	HM	Texture, Smell
10. Italian Dressing	HM	Color, Smell
11. Chicken Soup	HM	Color, Texture
12. Lemonade	S	Color, Taste