STRUCTURE AND BONDING

What is the name given to the structure of diamond, graphite and silicon dioxide?

• Mega covalent structure

• Mega ionic lattice

• Giant covalent

• Giant ionic

How many bonds does each carbon have in diamond?

• 2

• 4

• 6

• 8

Explain why diamond has a high melting point

• Giant structure, strong covalent bonds between the atoms, requires a lot of energy to break

• Giant structure, weak covalent bonds between the atoms, requires little energy to break

• Mega structure, strong covalent bonds between the atoms, requires a lot of energy to break

• Mega structure, weak covalent bonds between the atoms, requires little energy to break

Explain why most giant covalent substances do not conduct electricity.

• There are no electrons/ions/charged particles that are free to move

• The electrons/ions/charged particles that are free to move

• The electrons/ions/charged particles cannot carry the charge

• There are not enough electrons/ions/charged particles to carry the charge through the structure

What type of substance are methane and water?

• Giant covalent molecules

• Simple covalent molecules

• Giant ionic lattice

• Metallic structure

Which of these is covalent?

• NaCl
• Pb(NO₃)₂
• CO₂
• AlCl₃

In an ion, the metal ions tend to be _________ charged

• Positively

• Negatively

• Neutrally

• Reversely

All chemical bonds involve two atoms sharing electrons.

• True
• False

If an atom loses two electrons what charge will it have?

• + 2
•  - 2
• +1
• -1

Of the 3 states (solid, liquid, gas), which state has the highest energy?

• Solid

• Liquid

• Gas