Domain: Chemistry / ball_stick_model

turn: 1
modality: image
input: Generate a concise chemical laboratory bench scene: A substance is contained in a <correct and appropriate laboratory container type>. The substance must exhibit the following observable characteristics: <color + physical state (solid/liquid/gas) + form (powder/lump/crystal/solution, etc.) + optional luster/transparency; the name, chemical formula, or element symbols of the substance are prohibited>. The background should be a <laboratory environment: bench surface, outlines of basic equipment, avoid clutter and text labels>.
output: evaluation_points: 1. The container generated in the image is correct and is indeed the <container mentioned in the prompt> (e.g., a gas jar or a sealed flask for containing a gas).

2. The color and appearance (e.g., colorless gas) of the target substance conforms to the description '<colorless gas>'.

3. The substance is contained in the container in a correct manner (e.g., the gas jar is sealed or inverted over a bench, appropriately representing a gas sample). The amount is suitable.

4. The background is a simple laboratory bench scene.

turn: 2
modality: text
input: Based on the appearance of the substance in the input image, and given that this substance possesses the following properties: 1) It is highly soluble in water, and its aqueous solution is alkaline. 2) It has a pungent, characteristic odor. 3) It is less dense than air. Which of the following substances is it most likely to be?

Options:
A. Carbon Dioxide (CO2, colorless gas)
B. Ammonia (NH3, colorless gas)
C. Sulfur Dioxide (SO2, colorless gas)
D. Chlorine (Cl2, greenish-yellow gas)
E. None of the above
output: answer: B

turn: 3
modality: image
input: Generate a ball-and-stick model of the molecule for the 'target substance' identified in the first half of the task. Use a white background with no text labels or annotations. Adhere to the following atomic color scheme: H-white, C-black, O-red, N-blue, Cl-green, S-yellow, P-orange. For any elements not listed, use neutral gray and maintain consistency.
output: evaluation_points: 1. Correct atomic species and count (consistent with the real molecular composition of the target substance, NH3: one N atom, three H atoms).

2. Correct bonding connectivity (three N-H single bonds, forming a trigonal pyramidal core).

3. Correct key spatial configuration (trigonal pyramidal geometry around nitrogen, with a discernible bond angle).

4. Strict adherence to the atomic color mapping from the prompt and consistency throughout the image (N atoms are blue, H atoms are white).

5. Output is a clear ball-and-stick model: reasonable sphere and stick proportions, uncrowded structure, pure white background.

turn: 4
modality: image
input: Based on the ball-and-stick model generated in the previous turn, modify the molecular structure once according to the following rule and generate the modified ball-and-stick model: <Structural modification rule: Replace one of the hydrogen atoms bonded to the nitrogen atom with a methyl group (-CH3). Do not directly or indirectly state the substance name>. Except for the locally modified part, the rest of the structure should remain consistent with the input structure. Use the atomic color scheme from the previous turn. White background, no text labels.
output: evaluation_points: 1. Correct modification action (strictly conforms to 'Replace one H atom on N with a -CH3 group', not a different type like addition or elimination).

2. Correct and unique modification site (targets one of the three equivalent N-H bonds, resulting in a structure with N bonded to two H atoms and one CH3 group).

3. Self-consistent atomic count and bond connectivity in the modified structure (no valence errors, dangling bonds, extra bonds, or missing bonds; the new C atom forms four single bonds: one to N and three to H).

4. Consistency of the unmodified structure parts (the core N atom and the remaining two N-H bonds are preserved; the overall trigonal pyramidal geometry around N is maintained, though the symmetry is broken).

Consistency of the unmodified structure parts (the core N atom and the remaining two N-H bonds are preserved; the overall trigonal pyramidal geometry around N is maintained, though the symmetry is broken). The geometry and appearance of these unmodified parts should match the corresponding parts in the ball-and-stick model generated in Turn 3.

Strict use of the atomic color scheme from the previous turn's prompt (H-white, C-black, O-red, N-blue, Cl-green, S-yellow, P-orange; for any elements not listed, use neutral gray). Newly added atoms (C-black, H-white) also follow this scheme.