Question

1. identify the following diagrams as an element, a compound or a mixture.
2. identify the following as physical properties (p) or chemical properties (c).

______a. red color
______b. reacts with water.
______c. shiny
______d. flammable

Explanation:

Step1: Analyze diagram a

A compound has two or more different atoms chemically bonded. Diagram a shows molecules with two different - sized spheres (representing different atoms) bonded together.

Step2: Analyze diagram b

An element has only one type of atom. Diagram b has only one type of sphere (representing one type of atom).

Step3: Analyze diagram c

A mixture has different substances (could be elements or compounds). Diagram c has two types of particles: one - type of compound (with multiple atoms bonded) and one - type of element (single atom).

Step4: Analyze property a (Red color)

A physical property can be observed without changing the substance's chemical identity. Color is a physical property.

Step5: Analyze property b (Reacts with water)

A chemical property describes a substance's ability to undergo a chemical change. Reacting with water is a chemical change.

Step6: Analyze property c (Shiny)

Shininess (lustre) is a physical property as it can be observed without changing the substance's chemical nature.

Step7: Analyze property d (Flammable)

Flammability is a chemical property as it involves a substance reacting (burning, a chemical change) in the presence of oxygen.

Answer:

1. a. Compound; b. Element; c. Mixture
2. a. P; b. C; c. P; d. C