Question

1. appoint one group member to cut apart model 1 to separate the nine drawings. as a team, sort the drawings into two groups—one group where all the particles in the drawing are identical, and a second group in which the drawings contain more than one type of particle.

read this!
matter is classified as a pure substance when all of the particles are identical. matter is classified as a mixture if there are different types of particles present.

1. identify which drawings from question 7 are pure substances and which are mixtures. list the codes for the drawings in the appropriate places below.

\t\t\tpure substances\t\t\tmixtures
\t\t\t________\t\t\t________
\t\t\t________\t\t\t________
\t\t\t________\t\t\t________

1. how are the codes (chemical formulas) for pure substances different from those for mixtures?

1. as a team, take the set of pure substances drawings from question 8 and sort them into two new groups, those containing only one type of atom and those with two or more types of atoms.

Explanation:

To solve these questions, we analyze the definitions and apply them:

Question 8

• Pure Substances: Drawings where all particles are identical (match the definition of a pure substance).
• Mixtures: Drawings with more than one type of particle (match the definition of a mixture).

(Note: Since the actual drawings (Model 1) are not provided, assume the drawing codes are labeled (e.g., A, B, C, D, E, F, G, H, I). For example, if drawings A, C, E have identical particles, they are pure; B, D, F have mixed particles, they are mixtures.)

Question 9

• Pure Substances: Chemical formulas represent a single type of particle (e.g., \( \text{H}_2\text{O} \) for water, \( \text{O}_2 \) for oxygen gas—each formula describes one unique substance).
• Mixtures: Chemical formulas (or codes) represent multiple substances (e.g., a mixture of salt and water would involve \( \text{NaCl} \) and \( \text{H}_2\text{O} \), so multiple formulas/codes).

Question 10

• One Type of Atom (Elements): Pure substances with only one kind of atom (e.g., \( \text{O}_2 \), \( \text{Fe} \)).
• Two or More Types of Atoms (Compounds): Pure substances with two or more different atoms (e.g., \( \text{H}_2\text{O} \), \( \text{CO}_2 \)).

Example Answers (Hypothetical, based on typical models):

Question 8:

• Pure Substances: A, C, E, G, I (if these have identical particles).
• Mixtures: B, D, F, H (if these have mixed particles).

Question 9:

Pure substance codes (formulas) represent a single substance (one type of particle); mixture codes represent multiple substances (multiple particle types).

Question 10:

• One Type of Atom: A, E, I (if they show single-element particles like \( \text{O}_2 \), \( \text{Fe} \)).
• Two or More Types of Atoms: C, G (if they show compounds like \( \text{H}_2\text{O} \), \( \text{CO}_2 \)).

(Note: Replace with actual drawing codes once Model 1 is analyzed.)

Answer:

• One Type of Atom (Elements): Pure substances with only one kind of atom (e.g., \( \text{O}_2 \), \( \text{Fe} \)).
• Two or More Types of Atoms (Compounds): Pure substances with two or more different atoms (e.g., \( \text{H}_2\text{O} \), \( \text{CO}_2 \)).

Example Answers (Hypothetical, based on typical models):

Question 8:

• Pure Substances: A, C, E, G, I (if these have identical particles).
• Mixtures: B, D, F, H (if these have mixed particles).

Question 9:

Pure substance codes (formulas) represent a single substance (one type of particle); mixture codes represent multiple substances (multiple particle types).

Question 10:

• One Type of Atom: A, E, I (if they show single-element particles like \( \text{O}_2 \), \( \text{Fe} \)).
• Two or More Types of Atoms: C, G (if they show compounds like \( \text{H}_2\text{O} \), \( \text{CO}_2 \)).

(Note: Replace with actual drawing codes once Model 1 is analyzed.)