The Periodic Table
This family has 7 VE and are extremely reactive nonmetals
Halogens
What is the trend for atomic radius as you move down a group?
atomic radius increases
What type of bond forms between a metal and a nonmetal?
Ionic
Identify the cation and anion in this compound:
KCl
Cation: K
Anion: Cl
Who is credited for creating the current periodic table we use today?
Moseley
How is the current periodic table organized?
By atomic number
What is the periodic trend for ionization energy as you move across a period from left to right?
increases
What type of bond is present within this compound: CF
Covalent Bond
In a covalent Lewis structure, how many electrons are present in a bond?
2
This law states the physical and chemical properties of the elements recur in a systematic and predictable way when the elements are arranged in order of increasing atomic number,
The periodic law
I am an element in the 4th period and am in the Alkaline Earth Metal Family. Who am I?
Calcium
Which element has a higher electronegativity, fluorine or carbon?
Fluorine
Describe the electron behavior in metallic bonds
They have delocalized electrons, creating a "sea of electrons"
Draw the Lewis structure for CH4
see image
Which ion has a larger atomic radius: S or S-2?
S-2
What term describes elements that have properties of both metals and nonmetals?
Metalloids
Why does atomic radius decrease across a period?
Increased number of protons pulls electrons closer to the nucleus, decreasing the side of the radius.
What ion is aluminum going to form when it bonds to a nonmetal?
+3
Draw the Lewis structure for the compound MgBr2
See image
Draw the Lewis structure for CO2 and predict the molecular geometry (shape).
Lewis Structure: see image
Shape: Linear
I have similar chemical properties to aluminum, I have 3d electrons but not 4d, what element am I?
Gallium
Put the following in order from smallest electronegativity to highest electronegativity:
Al, O, Mg, Ne
Ne, Mg, Al, O
Compare the electrical conductivity of ionic, covalent, and metallic compounds in solid and liquid states.
Ionic Compounds do not conduct electricity in the solid state but do in the liquid state.
Covalent Compounds do not conduct electricity in any state.
Metallic Compounds conduct electricity in the solid state but not in the liquid state.
Draw the Lewis structure for NH3 and predict the molecular geometry (shape)
Lewis Structure: See image
Shape: Trigonal Pyramidal
I do not conduct electricity in the liquid state but do in the solid state, I have a very high melting point, and am malleable, what type of bond am I?
Metallic