AP Chemistry Unit 2 Review final

Front

What is electronegativity?

Back

Electronegativity is a measure of the tendency of an atom to attract a bonding pair of electrons. It is a key concept in understanding chemical bonding.

Front

Arrange the following elements in order of increasing electronegativity: antimony, fluorine, indium, selenium.

Back

indium, antimony, selenium, fluorine

Front

What is the formal charge on carbon in a neutral molecule?

Back

The formal charge on carbon in a neutral molecule is typically 0, assuming it forms four bonds.

Front

What type of bond is formed between sodium (Na) and iodine (I)?

Back

Ionic bond.

Front

What does VSEPR stand for?

Back

VSEPR stands for Valence Shell Electron Pair Repulsion, a model used to predict the geometry of individual molecules.

Front

What is the VSEPR shape of PCl5?

Back

Trigonal bipyramidal.

Front

What is the bond length of a diatomic hydrogen molecule (H2)?

Back

The bond length of H2 is approximately 0.74 Å (angstroms).

Front

How do you calculate formal charge?

Back

Formal charge = (Valence electrons) - (Non-bonding electrons) - (Bonding electrons/2).

Front

What is the difference between polar and non-polar covalent bonds?

Back

Polar covalent bonds occur when electrons are shared unequally between atoms, while non-polar covalent bonds occur when electrons are shared equally.

Front

What is the significance of bond length in a molecule?

Back

Bond length is the distance between the nuclei of two bonded atoms, influencing the stability and reactivity of the molecule.