CrossChemACP2024FinalReview

Front

What is a chemical change?

Back

A chemical change is a process where one or more substances are transformed into different substances with new chemical properties. Example: Burning a candle.

Front

What is the electron geometry of PH3?

Back

The electron geometry of PH3 is tetrahedral.

Front

What sublevel fills after 4f?

Back

The 5d sublevel fills after 4f.

Front

Which bond is least polar: H-F, H-S, H-N, or H-C?

Back

The bond H-C is the least polar.

Front

Which element has the smallest atomic radius: Rb, As, Li, or O?

Back

O (Oxygen) has the smallest atomic radius.

Front

Define electron geometry.

Back

Electron geometry refers to the spatial arrangement of all electron groups (bonding and lone pairs) around a central atom.

Front

What is the difference between a physical change and a chemical change?

Back

A physical change alters the form of a substance but not its chemical composition (e.g., melting ice), while a chemical change results in the formation of new substances (e.g., rusting iron).

Front

What is polarity in chemical bonds?

Back

Polarity in chemical bonds refers to the distribution of electrical charge over the atoms joined by the bond, leading to partial positive and negative charges.

Front

What is atomic radius?

Back

Atomic radius is the distance from the nucleus of an atom to the outermost shell of electrons, typically measured in picometers.

Front

What is the significance of the 4f and 5d sublevels in electron configuration?

Back

The 4f and 5d sublevels are part of the transition metals and lanthanides, influencing the chemical properties and reactivity of elements.