Lewis Structures

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

• 2
• 8
• 6
• 18

Hydrogen needs _____ electrons in its valence shell to be stable.

• 4
• 6
• 8
• 2

A covalent bond is

• a bond that shares electrons metallicaly
• A bond that shares electrons with non metals
• Metalloids bonding
• metals and nonmetals bonding

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

• A
• B
• C
• D

How many electrons can be used in the Lewis Structure for : NO₃ -

• 23
• 20
• 18
• 24

How many valence electrons are available for bonding in the sulfate ion (SO₄^-2)?

• 30 electrons
• 32 electrons
• 28 electrons
• impossible to tell

How many valence electrons are in Phosphorus?

• 15
• 4
• 5
• 31

This is a correct dot diagram for oxygen (O)

• true
• false

Which of these is the correct Lewis structure for NH₃?

• 
• 
• 
• 

When drawing Lewis structures, only __________ electrons are used.

• inner shell

• core

• valence

• stable