Lewis Dot Structure Vocab

What are Atoms made up of?
protons, neutrons and electrons
Locate: Protons and Neutrons.
In the center of the atom (Nucleus)
What is the name of the center of an atom?
Nucleus
What do electrons do?
Occupy the space surrounding the nucleus at varying distances.
What do electrons divide into?

core electrons

or

valence electrons

valence electrons are…
the outermost electrons and the ones involved in chemical reactions
Electrons occupy most of the ________ of an atom. They arrange themselves in ______ at varying distances from the nucleus.
Electrons occupy most of the volume of an atom. They arrange themselves in “shells” at varying distances from the nucleus.
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How do you represent valence electrons in a lewis dot structure?
the group number = valence electrons.
“He” is in group 8 but how many valence electrons does it really have?
2!
which of the group numbers are extremely stable?
Group 8 because they have full valence shells
What is the “octet rule”
elements react in a way to attain the electron configuration of Group 8
Metallic elements to the right or to the left tend to lose one or more electrons to form positive ions.
The left. they tend to lose one or more electrons to form positive ions such as Na+ and Mg2, each of which has the electron configuration of the Noble Gas that preceeds it
Nonmetals to the left or right of the table tend to either gain electrons to form negative ions or to share electrons in covalent bonds
Right.
FACT: When nonmetallic elements react with other nonmetallic elements, they share electrons in order to obtain 8 valence electrons
How many valence electrons are needed to satisfy the Octet Rule?
8!
What is a Covalent Bond?

When valence electrons form together to form the right number of electrons together. ie-

:F:F:

What are the UNshared electrons called?

Lone Pairs

 

:F:F:

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