Valence Electrons
How many valence electrons does Lithium have?
1. All group 1A elements have 1 valence electron.
Draw the electron dot diagram for neutral Magnesium.
Mg
Draw the electron configuration for Magnesium
1s22s22p63s2
Draw an electron dot diagram for NaCl.
Na+Cl-
What is an ion?
An atom that gains or loses an electron and has a positive or negative charge.
How many valence electrons does Argon have.
8. All Noble Gases have 8 valence electrons.
Draw the electron dot diagram for Sulfur and for the ion it forms.
Si
Draw the electron configuration for Neon
1s22s22p6
Draw an electron dot diagram for KCl.
K+Cl-
How many valence electrons does Carbon have?
4. All group 4A elements have 4 valence electrons.
Draw an electron dot for Chlorine as a neutral atom and as an ion. Is this an anion or a cation?
Cl
Anion
Draw the electron configuration for Boron. Long version and Noble Gas version.
1s22s22p1
[He]2s22p1
Draw an electron dot diagram for the molecule made of Calcium and Flourine.
CaF2
How many valence electrons does Aluminum have?
3. All Group 3A elements have 3 valence electrons.
Draw the electron dot diagram for neutral Strontium and the ion it forms. Anion or cation?
Sr
Cation
Draw the electron configuration for Chlorine. Noble Gas and long version.
1s22s22p63s23p5
[Ne]3s23p5
Draw an electron dot for the molecule made of Calcium and Chlorine.
CaCl2
What is a cation? How will you remember this?
A pawsitively charged ion.
How many valence electrons does Chlorine have?
7. All Group 7A elements have 7 valence electrons.
Draw the electron dot diagram for Krypton and the ion it forms.
Kr
Krypton does not form an ion since it already has 8 valence electrons.
Draw the electron configuration for Calcium. Long and Noble Gas version.
1s22s22p63s23p64s2
[Ar]4s2
Draw an electron dot diagram for the molecule made of Lithium and Nitrogen.
Li3N
What is an anion? How will you remember this?
A negatively charged ion.