Assignment ______
Class notes Reactivity and Valence electrons
Reactivity is an atom’s ability to:
• Bond with other atoms.
• Number of valence electrons determines reactivity
Valence electrons are:
• In the highest energy level
• Farthest away from the pull of the nucleus
• Easily lost to other atoms
Atoms with:
• 1, 2, 6, or 7 valence electrons are more reactive
• 3, 4, or 5 valence electrons are less reactive
• 8 valence electrons are stable ( non reactive)
o Do not react with other atoms
Atoms react by:
• gaining electrons
• losing electron
• sharing electrons
o to become stable
When atoms gain, share or lose electrons to react:
• a chemical bond is formed
o force that holds atoms together.
Example using Sodium chloride:
• Na has 1 valence electron
• Cl has 7 valence electrons
• Na loses its 1 to Cl
• Compound NaCl is stable with 8 valence electrons
Assignment ______
Class notes Reactivity and Valence electrons
Reactivity is an atom’s ability to:
• Bond with _____________________________________
• Number of valence electrons _______________________
Valence electrons are:
• In the _______________________________________
• Farthest away from the __________________________
• Easily ________________________________________
Atoms with:
• 1, 2, 6, or 7 valence electrons are ___________________
• 3, 4, or 5 valence electrons are _____________________
• 8 valence electrons are ___________________________
o Do not ___________________________________
Atoms react by:
• _____________________________________________
• _____________________________________________
• _____________________________________________
o to become stable
When atoms gain, share or lose electrons to react:
• a chemical bond is formed
o _________________________________________
Example using Sodium chloride:
• Na has _______________________________________
• Cl has ________________________________________
• Na loses its ___________________________________
• Compound NaCl is _______________________________