Periodic Table Flashcards
On the PT a group goes from___.
Top to bottom
On the PT a period goes from ___.
Left to right
What are two synonyms for group?
Column, Family
What is a synonym for period?
Row
Valence
The number of electrons on the outer energy level of an atom
Why is valence important?
It effects the way elements bond with each other.
What is the valence that all atoms “try” to reach?
8
If an element has a valance of 8___.
It will not react
If an element has a valence of 1 ___.
It will lose one electron (there will be an energy level of 8 exposed by this).
If an element has a valence of 2 ___.
It will lose two electrons (there will be an energy level of 8 exposed by this).
If an element has a valence of 3 ___.
It will lose three electrons (there will be an energy level of 8 exposed by this).
If an element has a valence of 4 ___.
It will gain or lose electrons because 4 is half way to 8.
If an element has a valence of 5 ___.
It will gain 3 electrons to fill its outer energy level to 8.
If an element has a valence of 6 ___.
It will gain 2 electrons to fill its outer energy level to 8.
If an element has a valence of 7 ___.
It will gain 1 electron to fill its outer energy level to 8.
One Oxygen atom will bond with ___ hydrogen atoms.
2
Oxygen has a valence of 6. Hydrogen has a valence of 1. Together the three atoms will have 8 valence electrons to satisfy oxygen.
One oxygen atom will bond with ___ magnesium atoms.
1
Oxygen has a valence of 6. Magnesium has a valence of 2. Together the two atoms will have 8 valence electrons to satisfy oxygen and magnesium.