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Physical Properties/Bonds
Don't be so forceful!
Electrons
Lewis and co.
Melting/Boiling Points
100
Between H20 and NaCl, which molecule has the higher boiling point?
What is NaCl?
100

the intermolecular force created between molecules with oppositely charged ends?

what is dipole-dipole
100

What is the charge on an ion when the atom loses 2 electrons?

2+
100
The number of dots around hydrogen
What is one?
100
Between H20 and H2S, which has a higher melting/boiling
H2O has a higher melting/boiling point
200

What is the bond formed when valence electrons are transferred

what is ionic bond?
200

the four types of intermolecular forces

dipole-dipole, hydrogen, and dispersion forces, ionic

200

What is the charge on an ion when the atom gains two electrons

2-
200
The number of dots around oxygen
What is 6?
200

What is the reason for higher melting/boiling points?

Greater intermolecular forces

300
Between Cl2 and Br2, which molecule has the higher vapor pressure?
Cl2
300

Why does water have an unusually high boiling point?

it is held together by H bonds.

300

group that has 3 valence electrons

what is group 3a?

300
The number of dots around a group 7a element
What is 7?
300

What compounds have the highest melting/boiling points

Ionic Compounds


400
Between NH3 and Cl2, which molecule has a greater molar heat of vaporization?
what is NH3?
400

What is the relationship between intermolecular forces and melting/boiling point?

The stronger the intermolecular forces, the higher melting/boiling point

400

group that loses 2 valence electrons


What are group 2a elements?

400
The number of dots around magnesium
What is two?
400

What intermolecular forces are responsible for the lowest boiling points

dispersion forces


500
H bonds with these atoms to make a H-Bond.
what is F, O, N
500

What is the strongest of the intermolecular forces?

ionic bonds
500
group that gains 2 electrons
What are group 6a elements?
500
The number of dots between two atoms that have a double covalent bond
What is four?
500
Between hydrogen bonds and dipole interactions, these will have lower boiling points.
What is dipole interactions?