2022_Chem Fall Final Review 2

Front

What is a diatomic element?

Back

A diatomic element is a molecule composed of two atoms, which can be of the same or different chemical elements. Examples include hydrogen (H2), nitrogen (N2), and oxygen (O2).

Front

Which elements are considered diatomic?

Back

The diatomic elements are hydrogen (H), nitrogen (N), oxygen (O), fluorine (F), chlorine (Cl), bromine (Br), and iodine (I).

Front

What is the formula for aluminum sulfide?

Back

The correct formula for aluminum sulfide is Al2S3.

Front

What is atomic radius?

Back

Atomic radius is the distance from the nucleus of an atom to the outermost shell of electrons. It generally increases down a group and decreases across a period.

Front

Which element in the second period has the largest atomic radius?

Back

Lithium has the largest atomic radius in the second period.

Front

What does a Lewis structure represent?

Back

A Lewis structure represents the bonding between atoms and the lone pairs of electrons in a molecule.

Front

What does the symbol above an atom in a Lewis structure indicate?

Back

The symbol indicates the relative attraction of electrons to that atom compared to others in the structure.

Front

What is a polar covalent bond?

Back

A polar covalent bond is a type of chemical bond where a pair of electrons is unequally shared between two atoms, leading to a dipole moment.

Front

What is a non-polar covalent bond?

Back

A non-polar covalent bond is a type of bond where two atoms share a pair of electrons equally, resulting in no charge separation.

Front

What is an ionic bond?

Back

An ionic bond is a chemical bond formed through the electrostatic attraction between oppositely charged ions.