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 (ionic solid)
b) Fe (metalic solid)
c) SiO2 (covalent network)
d) H2O covalent network))
E) KF (molecular solid
)

For Further Reading

metallic

metallic
ionic
molecular
ionic

To classify each substance by the type of solid it will form, you need to consider the types of bonds that hold the atoms together.

a) Na: Sodium (Na) tends to lose one electron to form a stable ion with a full outer electron shell. This results in the formation of positive sodium ions (Na+). The strong electrostatic attraction between the positive sodium ions and the negative electrons forms an ionic bond. Therefore, Na will form an ionic solid.

b) Fe: Iron (Fe) is a metal and tends to lose electrons to form positive iron ions (Fe2+ or Fe3+). These positive ions are held together by a "sea" of delocalized electrons, giving rise to metallic bonding. Therefore, Fe will form a metallic solid.

c) SiO2: Silicon dioxide (SiO2) consists of silicon (Si) and oxygen (O) atoms. The bonding between the atoms in SiO2 is predominantly covalent, with each oxygen atom sharing two electrons with the silicon atom. This results in the formation of a three-dimensional network of covalent bonds. Therefore, SiO2 will form a covalent network solid.

d) H2O: Water (H2O) consists of hydrogen (H) and oxygen (O) atoms. The bonding between the atoms in H2O is covalent, with each hydrogen atom sharing one electron with the oxygen atom. However, due to the bent shape of the molecule and the polar nature of the O-H bond, water molecules are attracted to each other through intermolecular forces called hydrogen bonds. Therefore, H2O will form a covalent network solid.

e) KF: Potassium fluoride (KF) consists of potassium (K) and fluoride (F) atoms. Both of these elements are nonmetals, and the bonding between them is covalent. Therefore, KF will form a molecular solid.

It is important to note that the classification of solids is based on the type of bonding between atoms/molecules and the arrangement of these particles in the solid. Further research and understanding of chemical bonding and solid structures can help enhance your knowledge on this topic.