Electrons
Molecules
Rules
Exceptions
Terms
100

Electrons around an atom that aren't used for bonding.

What are lone pairs / nonbonding electrons?

100

The number of single bonds in O3 (ozone).

What is one single bond?

100

The number of covalent bonds that carbon forms.

What is four bonds?

100

Hydrogen needs ___ valence electrons to be "happy".

What is 2?

100

A bond formed by sharing electrons between atoms.

What is a covalent bond?

200

The number of electrons involved in a triple bond.

What are six electrons?

200

What are the seven diatomic molecules found in nature?

What are bromine, oxygen, fluorine, iodine, nitrogen, chlorine, hydrogen.

200

What naming system is used specifically for covalent compounds that describes how many atoms of an element are in a molecule?

What are numerical prefixes?
200

Phosphorous has five valence electrons and would typically form three bonds, but can sometimes form how many bonds?

What are five bonds?

200

The covalent bond that forms when both electrons are donated by the same atom.

What is a coordinate covalent bond?


300

How many electrons are in O2?

What are 12 electrons?

300

What is the name of the following molecular compound: N2O5

What is dinitrogen pentoxide?

300

Covalent compounds are known for having what physical property?

What are low melting and boiling points?

300

Boron has 3 valence electrons. What is unusual about its bonding pattern?

Only needs 6 valence electrons; forms 3 bonds with no lone pairs.

300

A molecular representation that shows both the connections among atoms and the locations of lone-pair valence electrons.

What is a Lewis structure?

400

How many covalent bonds is Germanium (Z=32) likely to form?

What is four bonds?

400

What is the name of the following molecule: TiCl4

What is titanium tetrachloride?

400

Different molecules have different _____, which is the optimum distance between nuclei in a covalent bond. 

What is bond length?
400
Elements link chlorine, bromine, and phosphorous don't always follow the expected bonding patters because of what?

What are d-orbitals?

400

A molecular representation that shows the connections among atoms by using lines to represent covalent bonds.

What is a structural formula?

500

How many nonbonding electrons are on nitrogen, the central atom, in NO3-?

What are zero nonbonding electrons?

500

In looking at their Lewis structures, what is the bonding difference between a carbon dioxide molecule and a carbonate ion?

Carbonate has one double bond and a lone pair on carbon. Carbon dioxide has two double bonds. 

500

Double bonds are commonly formed between carbon and what element?

What is oxygen?

500

What element is the least likely to form covalent bonds, yet can have 2, 4, or 6 bonds?

What is xenon?

500

A molecular representation in which bonds are understood by the order in which they are written rather than specifically shown.

What is a condensed structure?