AP Chemistry Unit 1 - Thou Shalt Not Forget

Fill-in-the-blank practice flashcards covering essential concepts from AP Chemistry Unit 1 notes.

Compounds can be separated into elements by chemical changes, and mixtures can be separated by __________ changes.

physical

Filtering separates mixtures based on differences in __________.

particle size

Distillation separates mixtures based on differences in __________.

boiling point

Chromatography separates mixtures based on differences in __________.

polarity

In paper chromatography, the component that is most similar in polarity to the mobile phase moves up the __________.

farthest

__________ is conserved during chemical and physical changes.

Mass

When reading the volume on the buret described in the notes, you should read it as __________.

$$5.65\,mL$$

Ranking measuring devices from least precise to most precise is beaker, graduated cylinder, volumetric flasks, and __________.

burette

The formula for density is mass divided by __________.

volume

The % composition by mass for a pure compound __________.

does not change

When an electron is in a higher energy level, it is farther away from the nucleus and therefore has less __________ attraction to the nucleus.

Coulombic

Moving across a row on the periodic table, the $Z_{eff}$ increases, causing the atomic radius to __________.

decrease

When reading a PES graph, a larger binding energy means that the electrons are __________ to the nucleus.

closer

When writing the electron configuration for a cation, remove the __________ electrons first.

valence

Isotopes of an element have the same number of protons, but different numbers of __________.

neutrons

Mass spectroscopy graphs measure atomic masses of __________.

isotopes

On the periodic table, nonmetals are located on the __________ side of the zig-zag line.

right

Anions are larger than their atoms since adding extra electrons increases __________ repulsions.

electron-electron

Carbon makes a total of __________ bonds in a compound.

$$4$$

For a molecule with $4$ domains, the bond angle is __________.

$$109.5^\circ$$

Ranking measuring devices from least precise to most precise is beaker, __________, volumetric flasks, and Burette

Graduated cylinder

Ranking measuring devices from least precise to most precise is beaker, graduated cylinder,_______, and burette.

Volumetric flasks

Ranking measuring devices from least precise to most precise is _______, graduated cylinder, volumetric flasks, and burette

Beaker