Atomic Trends
What two directions do you have to go to increase Atomic Size on the periodic table?
Left of the Period and Down the Group
An ionic bond is a _______ of electrons from one nonmetal and one metal.
Transfer
Would a partial orbital diagram or a condensed electron configuration be used to best visualize the ms of a specific electron in an orbital?
Partial orbital diagram, because you can use the arrows to show the direction each electron will be spinning, either +1/2 (up) or -1/2 (down)
What electrons are used when we draw out Lewis Structures?
Valence Electrons
What is the only possible Molecular Shape for a SN number of 2
Linear
Rank the following elements according to Atomic size, in decreasing order: Cl, W, Cs, Sb
Cs(biggest), W, Sb, Cl(smallest)
True or False: Ionic compounds have higher boiling points than their melting points
True, best to think of it as melting point is going from solid to liquid, while boiling point for ionic compounds is going from solid to gas, which takes more energy and heat.
What is the Condensed Electron Configuration of Copper
[Ar]4s13d10
How many Valence electrons are there in total of COCl2
24 valence electrons in total
How many Bonding groups are there in CO2
Just 2, lone pairs don't count as bonding groups, since the are the E part in the AXE configuration.
Using the given Electron affinity values, tell me which element is LEAST likely to form and anion
A) Cl (-359 kj/mol)
B) Be (+48 kj/mol)
C) Ca (-2 kj/mol)
Be, this is because a more negative value would be most likely to form an anion, while a more positive value is least likely to form an anion.
Molecular covalent compounds:
A) Have Low melting and Boiling points
B) Have Weak intramolecular forces
C) Are brittle and malleable
Correct answer is A, because they have weaker intermolecular forces, this causes them to have relatively low melting and boiling points
Is Copper diamagnetic or paramagnetic
it is diamagnetic, because all the d electrons are paired up
How many lone pair are present in the molecule NHCl2?
7 in total. 3 on each chlorine atom and 1 on nitrogen
What are the two possible bond angles for a
90 and 120 degrees
Lattice energy is proportional and inversely proportional to what? (Think about the equation)
Proportional to the Charge of the Cation and Anion and inversely proportional to the distance between both ions (or Size)
True or False: Nonpolar covalent bonds involve equal sharing on electrons and polar covalent bonds involve unequal sharing of electrons?
True
Draw the Pseudo and inert electron configuration of Germanium (Ge). What are the charges resulted in both configurations?
Pseduo - [Ar]3d10 results in +4 charge
Inert-pair - [Ar] 4s23d10 results in +2 charge
Calculate the formal charge of all atoms present in CO2. One oxygen in single bonded to central carbon, and the other oxygen is triple-bonded to central carbon.
Central Carbon = 0
Triple bonded oxygen = +1
What is the SN number and Molecular Shape of AX3E2. Also give the bond angles of the bonded atoms?
SN=5
Molecular shape: T-shaped
Bond angle: less than 90o
Which as the lowest lattice energy: CsBr, NaCl, SrO, CaO, KBr (taken from the practice exam)
CsBr because it has the bigger cation and anion, which makes them relatively lower in energy because there are weaker electrostatic attractions
Diamond and Graphite (in pencils) are both made out of the same exact element, Carbon. Which one is harder, and why is that one harder than the other?
Diamond is harder. The Carbon atoms in Diamonds are more tightly packed in a LATTICE structure while graphite is loosely packed, hence why pencil lead breaks when you press too hard.
How many Inner, outer, and valence electrons are there for Ag
46, 1, 1
How many possible resonance structures are there for OCS and which structure contributes the most to the resonance hybrid?
3 possible structures. The structure that shows zero formal charges on all atoms (the one with 2 double bonds) contributes most to the resonance hybrid.
Molecular shape of XeF4
Square Planar
AX4E2