Materials Sciences

There are two main types of atomic bonds. Which of the following are an example of strong primary bonds?

• Ionic bonding

• Covalent bonding

• Van der Walls bonding

• Hydrogen bonding

An ionic bonding is created

• between two unlike atoms with different electronegativities

• by sharing their electron valence

• when each metal atom gives up its valence electrons to form positive ions.

• by interaction of dipole-dipole between polar bonds containing hydrogen atom

Covalent bond can be represented by

There are four basic types of materials. Name 4 of each types with an example.

A 150g alloy of nickel and copper consists of 60wt% Cu and 40wt% Ni. Calculate the percentage of Cu and Ni atoms in this alloy. Given atomic weight Cu 63.54 g/mol and atomic weight of Ni 58.69 g/mol.