Question

1. the diagram above shows the repeating groups of atoms that make up two samples. will the properties of the two samples likely be the same or different? (examples of properties are smell, color, and the temperature at which a substance melts.)

a the properties will likely be different because the repeating groups of atoms that make up each sample are different.
b the properties will likely be different because there are more repeating groups of atoms in sample 2.
c the properties will likely be the same because the repeating groups of atoms that make up the two samples have the same number of atoms.
d the properties will likely be the same because the repeating groups of atoms that make up the two samples have two of the same types of atoms.

Explanation:

To determine the properties of the two samples, we analyze the repeating groups of atoms. The key factor for a substance's properties is its chemical structure (the repeating group of atoms). Sample 1 has a repeating group with yellow, black, and red atoms, while Sample 2 has a repeating group with purple, black, and red atoms. Different repeating groups (different chemical structures) mean different substances, so their properties (like smell, melting point) will differ.

• Option a: Correct, as the repeating groups are different, leading to different properties.
• Option b: Incorrect, the number of repeating groups affects quantity, not intrinsic properties.
• Option c: Incorrect, same number of atoms doesn't mean same structure/properties.
• Option d: Incorrect, having two same atom types doesn't mean same structure (Sample 1 has yellow, Sample 2 has purple—different structures).

Answer:

a. The properties will likely be different because the repeating groups of atoms that make up each sample are different.