chemistry question

Question

1. Depending on the types of particles in a solid crystal, the properties differ widely. A chemist is testing three crystalline solids in the lab and has gathered the data in the table below. Use the given data to determine the type of bonding (ionic, covalent, metallic) in each solid. Make sure to explain your answer using the specific properties that helped you decide the identity of the bond type. 

Properties of Crystal Substances
Substance	Relative Melting Point	Relative Boiling Point	Malleable	Electrical Conductor when Solid	Electrical Conductor when Liquid
X	low	low	no	no	no
Y	high	high	yes	yes	yes
Z	high	high	no	no	yes

 

	Type of Bonding	Explanation
X
Y
Z

Answer 1

Metals conduct, are lustrous,malleable, ductile and have a wide range of melting points.

Ionic compounds tend to be brittle, have high melting points and conduct electricity when dissolved in water or melted because they break apart into lions.

Covalently bonded can be 2 possibilities:

Network solids that have covalent bonds throughout, high melting points, some of the hardest substances known. Do not conduct.

Molecules that are held together physically by weak intermolecular forces. They have low melting temps and tend to be cheesy, waxy, oily if they form solids at all. They can also form some brittle solids. They do not conduct in any state.