Atomic Structure
Oh so Periodic
Ionic vs Covalent
Structures & Shapes
All Things Polar
Intermolecular
100
How many protons, neutrons and electrons are there in an atom of 197Au ?
The superscript represents the mass number (protons + neutrons)
197Au has 79 protons, 79 electrons, and 197 -79 = 118 neutrons
100
Elements in this group do not undergo any naturally occurring reactions.
Noble Gases
100
A(n) ____________ compound typically conducts electricity when dissolved in water.
Ionic Compound.
100
Draw the Lewis structure for CO2
100
True or False: nonpolar solutes dissolve in polar solvents
False
"Like dissolves like"
100
Which type of intermolecular force is the strongest?
Hydrogen Bonding
200
An ____________________ represents one twelfth of the mass of a carbon-12 atom
Atomic Mass Unit
200
Using only their location in the periodic table, rank the atoms Mg, Be, and Ba by decreasing atomic size.
Atomic size increases down a group and decreases across a period in the periodic table.
Therefore, the relative atomic size of Mg, Be and Ba is as follows:
Ba>Mg>Be
200
Which has the higher melting point, NaCl or HCl?
NaCl
200
Draw the Lewis Structure for MgCl2
200
True or False: a polar molecule must have at least one polar bond and must be asymmetric
True
200
Which type of intermolecular force is always present?
London dispersion
300
A Mg2+ ion will be isoelectric to which element?
Neon
300
The energy that is either absorbed or released during the addition of an electron to a neutral atom is called an atom's ______________________.
Electron Affinity
300
_______________ compounds tend to have low solubility in water.
Covalent
300
Draw the Lewis Structure for SF6
300
Calculate the △EN and determine the type of bond for C-O (ENc = 2.5, ENo = 3.5)
△EN = 1.0
1.0 > 0.4 ∴ this is a polar bond
300
Which type(s) of intermolecular forces are present in SiCl4
London dispersion only
400
Draw the Bohr-Rutherford diagram for magnesium
400
The amount of energy required to remove the outermost electron from an atom or ion in the gaseous state is called the __________________________.
Ionization Energy
400
In ionic compounds, the _______________ tends to transfer its electrons to a ________________.
metal
nonmetal
400
Draw the Lewis structure for AlCl3
400
Is CH3Br polar or nonpolar?
Polar
400
Which molecule will have the highest melting point: NH3 or H2O?
H2O
500
Draw the Bohr-Rutherford Diagram for Fluorine
500
______________________ is an indicator of the relative ability of an atom to attract shared electrons.
Electronegativity
500
Which compound will have the higher boiling point, MgO or H2O?
MgO
500
Draw the Lewis structure for PCl3
500
Is BF3 polar or nonpolar?
Nonpolar
500
What type(s) of intermolecular forces are present in CH2O?
Dipole-dipole and london dispersion