AP Chemistry Thou Shall Not Forget- Part 1

Front

What are the intermolecular forces present in PCl3?

Back

London dispersion forces and dipole-dipole interactions.

Front

Identify the compound represented by the formula H2S.

Back

Hydrogen sulfide.

Front

Why do atoms decrease in size when moving from left to right across a period in the periodic table?

Back

The increase in protons in the nucleus attracts electrons more strongly, pulling them closer.

Front

How many covalent bonds does carbon typically form in a Lewis structure?

Back

4 covalent bonds.

Front

In a Photoelectric Spectroscopy (PES) graph, what does the height of a peak indicate?

Back

The number of electrons in that energy level.

Front

Define London dispersion forces.

Back

Weak intermolecular forces arising from temporary dipoles in molecules.

Front

What is dipole-dipole interaction?

Back

Attractive forces between polar molecules due to their permanent dipoles.

Front

Explain the significance of protons in determining atomic size across a period.

Back

More protons increase the positive charge in the nucleus, attracting electrons more strongly and reducing atomic size.

Front

What is the general rule for drawing Lewis structures regarding valence electrons?

Back

The total number of valence electrons must equal the sum of the valence electrons of all atoms in the molecule.

Front

What is the role of energy shells in atomic structure?

Back

Energy shells are regions around the nucleus where electrons are likely to be found.