Classify each of the follwing by the type of solid(molecular, ionic, metallic, covalent network)it will form:
a) Na
b) Fe
c) SiO2
d) H2O
E) KF
The result that I got are :
a) Na (molecular solid)
b) Fe (metalic solid)
c) SiO2 (ionic solid)
d) H2O (ionoc solid)
E) KF (covalent network)
I think you need to review the definitions. You missed all but b).
To classify each compound by the type of solid it will form, we need to understand the different types of solids. Here is a brief explanation of each type:
1. Molecular Solids: These solids are composed of individual molecules held together by intermolecular forces. The molecules are not bonded to each other, so they can be easily separated. Molecular solids generally have low melting and boiling points.
2. Ionic Solids: These solids are made up of positive and negative ions that are held together by strong electrostatic forces. Ionic solids have high melting and boiling points due to the strong attractions between the ions. They also tend to be brittle and conduct electricity when dissolved or molten.
3. Metallic Solids: These solids consist of metal cations surrounded by a "sea" of delocalized electrons. The positive metal ions and the negatively charged electrons are held together by metallic bonding. Metallic solids have high melting points, are malleable, and conduct electricity well.
4. Covalent Network Solids: These solids are composed of a three-dimensional network of covalent bonds. The atoms are held together by strong covalent bonds, resulting in high melting points. Covalent network solids do not conduct electricity because there are no free ions or electrons.
Now, let's classify each compound based on its solid type:
a) Na: Sodium (Na) is a metallic element, so it would form a metallic solid.
b) Fe: Iron (Fe) is also a metallic element, so it would form a metallic solid.
c) SiO2: Silicon dioxide (SiO2) is a compound made up of silicon and oxygen. It forms a covalent network solid, also known as a giant covalent or macromolecular solid. This is because each silicon atom is bonded to four oxygen atoms, forming a three-dimensional network of covalent bonds.
d) H2O: Water (H2O) is a compound with polar covalent bonds. It can form different types of solids depending on the conditions. When water freezes, it forms an open lattice structure held together by hydrogen bonding, resulting in an ice crystal lattice. This would be classified as a molecular solid.
e) KF: Potassium fluoride (KF) is an ionic compound consisting of potassium cations (K+) and fluoride anions (F-). It forms an ionic solid due to the strong electrostatic interactions between the positively and negatively charged ions.
So, the correct classifications for each compound are:
a) Na - Metallic solid
b) Fe - Metallic solid
c) SiO2 - Covalent network solid
d) H2O - Molecular solid
e) KF - Ionic solid
I apologize for the incorrect classification you provided. Let me correct that for you:
a) Na (ionic solid) - Sodium (Na) is a metal, and when it reacts with another element, such as chlorine (Cl), it forms an ionic compound. Ionic solids are composed of positively and negatively charged ions held together by electrostatic forces.
b) Fe (metallic solid) - Iron (Fe) is a metal that can form metallic solids. Metallic solids have a lattice structure where metal ions are surrounded by a sea of delocalized electrons.
c) SiO2 (covalent network solid) - Silicon dioxide (SiO2) is a compound consisting of silicon and oxygen. Covalent network solids are held together by a network of covalent bonds, forming a rigid structure.
d) H2O (molecular solid) - Water (H2O) is a molecular compound. Molecular solids consist of molecules held together by intermolecular forces such as hydrogen bonding.
e) KF (ionic solid) - Potassium fluoride (KF) is an ionic compound. Ionic solids are composed of positively and negatively charged ions held together by electrostatic forces.
Here is the correct classification:
a) Na - ionic solid
b) Fe - metallic solid
c) SiO2 - covalent network solid
d) H2O - molecular solid
e) KF - ionic solid