Chemistry Fall Semester Exam 2024

Front

What is the formula for sodium fluoride?

Back

NaF

Front

What is the oxidation number of nitrogen in N2O4?

Back

+4

Front

Which metal will not float in mercury?

Back

Gold

Front

What property allows ionic compounds to form cubic lattice structures?

Back

Ionic bonds form between common positively and negatively charged ions in such a way as to keep like-charged ions far apart and oppositely charged ions close together.

Front

What is the formula for copper (I) oxide?

Back

Cu2O

Front

Define ionic bond.

Back

An ionic bond is a type of chemical bond that occurs between two atoms when one atom donates an electron to another, resulting in the formation of oppositely charged ions that attract each other.

Front

What is the difference between ionic and covalent bonds?

Back

Ionic bonds involve the transfer of electrons from one atom to another, while covalent bonds involve the sharing of electrons between atoms.

Front

What is the significance of oxidation numbers in chemical reactions?

Back

Oxidation numbers help to determine how electrons are transferred in redox reactions and to balance chemical equations.

Front

What is a crystal lattice?

Back

A crystal lattice is a three-dimensional arrangement of atoms or ions in a crystalline solid, characterized by a repeating pattern.

Front

What is the formula for sodium chloride?

Back

NaCl