lewis dot & covalent bonding

According to the octet rule most elements need _______ valence electrons.

• 2
• 8
• 6
• 18

Which of the following is the correct Lewis dot structure for the molecule fluorine (F₂)?

• A
• B
• C
• D

This could be the dot diagram of

• Mg

• Cl

• C

• O

This is a correct dot diagram for neon (Ne)

• true

• false

This is the correct dot diagram for nitrogen, group 15.

• true
• false

How many electrons should sodium, atomic number 11, have around its Lewis dot model?

• 1

• 2

• 3

• 4

How would you draw a Lewis dot diagram for Magnesium?

• 
• 
• 
• 

The structure of copper is described as a lattice of positive ions in a ‘sea of electrons’.

Which statements are correct?

• Copper has a high melting point because of the strong electrostatic attraction between the positive ions and the ‘sea of electrons’.

• Copper is malleable because the layers of atoms in the lattice can slide over each other.

• Copper atoms can be oxidised to form copper ions by losing electrons.

Which statement describes the lattice structure of a metal?

• The lattice consists of alternating positive ions and negative ions.

• The lattice consists of neutral atoms arranged in layers.

• The lattice consists of positive ions in a ‘sea of electrons’.

• The lattice consists of neutral atoms in a ‘sea of electrons’.

True or False: A metallic bond may form between a metal and any other element

• True

• False