IB SL CHEM - Silicon & Silicon Dioxide

What type of bonding is present in silicon?

• ionic

• metallic

• hydrogen

• covalent

What is the structure of silicon dioxide?

• Metallic structure

• Ionic structure

• Molecular structure

• Network covalent structure

How is bonding in silicon dioxide different from covalent bonding in silicon?

• In silicon dioxide, bonding occurs between silicon and oxygen atoms through covalent bonds, whereas in silicon, bonding occurs only between silicon atoms through covalent bonds.

• In silicon dioxide, bonding occurs between silicon and oxygen atoms through metallic bonds, whereas in silicon, bonding occurs only between silicon atoms through covalent bonds.

• In silicon dioxide, bonding occurs between silicon and oxygen atoms through ionic bonds, whereas in silicon, bonding occurs only between silicon atoms through covalent bonds.

• In silicon dioxide, bonding occurs between silicon and oxygen atoms through hydrogen bonds, whereas in silicon, bonding occurs only between silicon atoms through covalent bonds.

What is the chemical formula of silicon dioxide?

• SiO2

• SO2

• CO2

• SiO

What are the physical properties of silicon dioxide?

• Silicon dioxide is a white, crystalline solid with a high melting point. It is insoluble in water and has a low electrical conductivity.

• Silicon dioxide is a blue, crystalline solid with a low melting point. It is soluble in water and has a high electrical conductivity.

• Silicon dioxide is a yellow, liquid substance with a moderate melting point. It is soluble in water and has a high electrical conductivity.

• Silicon dioxide is a black, amorphous solid with a low melting point. It is soluble in water and has a high electrical conductivity.

What is the melting point of silicon dioxide?

• 100 degrees Celsius

• 500 degrees Celsius

• 1,710 degrees Celsius

• 2,000 degrees Celsius

How does the structure of silicon dioxide contribute to its properties?

• The structure of silicon dioxide is composed of metallic bonds, giving it hardness and a high melting point

• The structure of silicon dioxide is a two-dimensional lattice, giving it hardness and a high melting point

• The structure of silicon dioxide is held together by ionic bonds, giving it hardness and a high melting point

• The structure of silicon dioxide forms a three-dimensional network of covalent bonds, giving it hardness and a high melting point

What are the properties of silicon?

• Silicon is a soft, flexible material with a red metallic lustre. It is a divalent metal and conductor.

• Silicon is a liquid with a yellow metallic lustre. It is a trivalent nonmetal and insulator.

• Silicon is a gas with a green metallic lustre. It is a pentavalent metal and superconductor.

• Silicon is a hard, brittle crystalline solid with a blue-grey metallic lustre. It is a tetravalent metalloid and semiconductor.