Question

chemical bonding
jewelers use gems in jewelry because of their appearances and how they can be shaped. the metals used in jewelry have different uses and properties than gems. once you have viewed the investigative phenomenon video and worked on a first draft of a claim - evidence - reasoning exercise to explain the phenomenon you observed, answer the following reflection questions about the physical properties of gems and metals.
1 ccc patterns compare the properties of the gems and metals in the photo.
gems metals
2 sep construct an explanation metals usually bend without breaking, while gems usually break in a specific pattern. what might be happening to the bonds between the atoms in these materials that can explain this difference?

Explanation:

1. Gems are usually hard, brittle, and have high - refractive indices giving them luster. Metals are malleable, ductile, good conductors of heat and electricity.
2. In metals, there are metallic bonds where electrons are delocalized and can move freely. This allows the metal ions to slide past each other when force is applied, enabling bending. In gems, which often have ionic or covalent bonds, the bonds are more directional. When force is applied, the bonds break along specific planes due to the fixed arrangement of atoms in the crystal lattice.

Answer:

1.

Gems	Metals

1. In metals, delocalized electrons in metallic bonds allow ions to slide for bending. In gems, directional ionic or covalent bonds break along specific planes due to fixed atomic lattice arrangement.