Atoms/Chemicals
Ionic vs. Covalent
Periodic Table
Lewis Structures
IMF
100

Based on the following chemical model below, the farthest circle (third energy level) contains what kind of electrons?


Valence Electrons

100

Name the following compound and determine if it's ionic or covalent?

BaCl2

Barium Chloride

Ionic - Metal and Nonmetal

100

Elements in group 2 has how many valence electrons? What is the group name of these elements?

2 valence electrons, Alkaline Earth Metals

100

Lewis dot structures only show these types of electrons

valence electrons

100

intermolecular forces exist between ________ compounds.

covalent

200

Based on the following picture of the movement of an electron, from the second to the first energy level, what happens to the energy? (Released or Absorbed)

Since the electron goes from a high to a low energy level, energy is being is released!

200

How can you tell if a compound is ionic?

If the compound contains a metal and a nonmetal and they are oppositely charged, this is considered as an ionic compound.

200

Rank the following atoms from smallest to largest in terms of their atomic size:

Li, H, Fr, Cs

H < Li < Cs < Fr

200

Draw the Lewis structure for water

200

order the 3 intermolecular forces we learned about from strongest to weakest

hydrogen bonding, dipole-dipole, London Dispersion Forces

300

If you compare two atoms and you found out that they are "isotopes," what features do they have in common? What features do they differ?

Same number of protons, different number of neutrons

300
What is the name of this compound and determine if its ionic or covalent?

P2F5

Diphosphorus Pentafluoride


Covalent (Only nonmetals)

300

What is the most electronegative element in the periodic table?

Fluorine!!!!

300

The following diagram shows the transfer of electrons to form what ionic compound? (Please provide the chemical name/formula)

Sodium Phosphide (Na3P)

300

fluorine, oxygen, and nitrogen are 3 elements that are necessary for the formation of these IMFs

hydrogen bonds

400

Chlorine-38 (Atomic number: 17) has how many neutrons?

# of Neutrons:  Mass Number - Atomic Number

                       38 - 17 = 21 neutrons

400

Calcium reacts with Fluorine to form Calcium Fluoride. What is the chemical formula of this compound?

Ca2+ + F-      -->  CaF2


For every two atoms of fluorine there is 1 atom of calcium!!

400

Which of the following elements have similar characteristics with one another? Why?

Ca vs. Ba    or       S vs. Cl

Calcium vs Barium are more similar to one another as they are in the located in the same column (group)
400

Draw the lewis dot structure for CaCl2

This is an ionic compound, therefore, you will need to include brackets on the drawing.

400

CH3Cl is considered to be a polar covalent molecule, what is the strongest intermolecular force does this molecule contain?

This molecule has dipole-dipole and London dispersion force, however, the strongest force this has is dipole-dipole.

500

Explain the difference of a molecule and an ionic compound:

Molecule: two or more nonmetallic atoms that share electrons to form a bond

Ionic Compound: two or more atoms (metal/nonmetals) transfers electrons to form a bond

500

Please provide two examples on what sets an ionic compound apart from a covalent compound.

An ionic compound has a stronger intramolecular attraction as compare to a covalent compound due to the high melting point.

In addition, ionic compounds can conduct electricity due to the presence of ions when melted/dissolved.

500

Which of the following elements have the same energy level with Boron? Why?

Neon, Aluminum, Helium, or Silicon 

Neon, both of the elements are located in the same period (same row)

500

Draw the lewis structure for a nitrogen molecule 

Linear

500

How do you know if a molecule is considered to be polar or nonpolar?

If the electrons are shared unequally in a molecule then it will be polar.

However, if the electrons are shared equally in a molecule, then it will be considered as nonpolar

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