P. Trends
Which element is larger in radius: Mg or N
Mg
Which type of solid contains IMFs (intermolecular forces)?
molecular covalent
Name the following ionic compound: NaCl
Sodium Chloride
List two elements that have 6 valence electrons.
Elements from group 16
Draw the lewis structure for water.
See student picture
Which element is more electronegative: O or P
O
Why do molecular covalents have a lower melting point than ionic solids?
IMF's (forces) holding molecule together, therefore not as much energy needed to pull apart
Name the following covalent compound: N2O3
dinitrogen trioxide
List two elements that make a 3- ion.
Elements from group 15
Draw the lewis structure for N2
see student picture
Rank the following elements from big to small:
N, Mg, S, Ge
Ge, Mg, S, N
List 3 properties of ionic solids
dissolve
conductive when dissolved
brittle
crystalline
Name the following ionic compound: Fe2O3
Iron (III) oxide
Draw the ionic lewis structure for MgF2
answers vary
What is the angle between electron groups in a tetrahedral?
109.5o
Explain the trend for radius across the period (L to R).
more protons=strong magnet=Shrink
Explain why H2 is nonpolar covalent?
equal sharing of electrons
Write the formula for the following acid: sulfurous acid
H2(SO3)
What is the chemical formula for magnesium bonded with nitrogen?
Mg3N2
What is the molecular geometry H2S
bent
Explain the trend for electronegativity across the period (L to R)
Increases. more val e on outer shell = affinity for electrons is stronger
Give an example of a polar molecule.
Answers may vary
Cr2(CO3)3
What is the chemical formula for sodium bonded with hydroxide?
Na(OH)
what is the molecular geometry of PH3
trigonal pyramidal