Question

1. have you noticed some molecules only work in certain arrangements? (if not, complete another collection and pay attention to this.) choose one molecule and give examples of arrangements that do not work and ones that do:

molecule chosen: _________________________
unaccepted arrangement (sketch): accepted arrangement (sketch):

1. create your own molecules and complete the tables below:

collection 3: multiple molecules of the same compound
chemical formula | name of molecule | # of molecules | # of total elements | # of total atoms | sketch
blank rows

Explanation:

For Question 4:

Let's choose water (\(H_2O\)) as the molecule.

• Unaccepted arrangement: A structure where the oxygen atom is not bonded to the two hydrogen atoms (e.g., hydrogen atoms bonded to each other and oxygen separate). In reality, water has a bent structure with O bonded to two H.
• Accepted arrangement: The bent molecular geometry (angular shape) with the oxygen atom in the center, bonded to two hydrogen atoms (H - O - H with a bond angle around 104.5°).

for table calculations (using water as example):

Step1: Determine total elements

For \(H_2O\), elements are H and O, so 2 total elements.

Step2: Calculate total atoms per molecule

Each \(H_2O\) has \(2 + 1 = 3\) atoms.

Step3: Calculate total atoms for 2 molecules

Multiply atoms per molecule by number of molecules: \(2\times3 = 6\).

(Repeat similar steps for \(CO_2\): per molecule \(1 + 2 = 3\) atoms, 3 molecules give \(3\times3 = 9\) atoms; elements are C and O, so 2 total elements.)

Answer:

• Molecule chosen: Water (\(H_2O\))
• Unaccepted arrangement (sketch): Draw three separate atoms (O, H, H) not bonded properly (e.g., H - H and O alone).
• Accepted arrangement (sketch): Draw O in the center with two H atoms bonded to it, forming a bent shape (like a "V" with O at the vertex and H at the ends).

For Question 5 (Filling the table for Collection 3, let's take water as the molecule):

Chemical Formula	Name of Molecule	# of molecules	# of TOTAL elements	# of TOTAL atoms	Sketch
\(CO_2\)	Carbon Dioxide	3	2 (C and O)	\(3\times(1 + 2)=9\)	Draw three \(CO_2\) molecules (linear, O - C - O)