Valence Electrons
Sodium (Na) has this many valence electorns
1
Sodium (Na) forms ______ ions
+1
When electrons are shared between two atoms it is called _______
covalent bond
What is the molecular geometry of methane (CH4)?
Tetrahedral
What is the molecular geometry of carbon dioxide (CO2)?
Linear
Calcium (Ca) has this many valence electrons
2
Calcium (Ca) forms _______ ions
+2
When a metal donates an electron and a non-metal accepts the electron, this is called _________ bond
ionic
What is the molecular geometry of ammonia (NH3)?
Trigonal pyramidal
What is the molecular geometry of PF5?
trigonal bipyramidal
Bromine (Br) has this many valence electrons
7
Bromine (Br) forms ______ ions
-1
When two atoms are sharing electrons but the electronegativity difference is high, this results in a ______ covalent
polar
What is the molecular geometry of BF3?
Trigonal planar
In VSEPR theory, electron dense regions ______ each other
repel
6
Oxygen (O) forms ______ ions
-2
The amount that an atom pulls on electrons is called ________
electronegativity
What is the molecular geometry of water (H2O)?
Bent
True or false: lone pairs are considered electron dense regions
true
Nitrogen has this many valence electrons
5
Nitrogen (N) forms ________ ions
-3
the amount of energy to remove a valence electron from an atom is called ________
ionization energy
What is the molecular geometry of SiO2?
Bent
Why is the bond angle of NH3 smaller than the bond angle of CH4?
The lone pair on the nitrogen is close to the nucleus and repels the bonds, pushing the atoms of hydrogen closer together