Grade Repair Compounds Test

Front

What is a Lewis structure?

Back

A Lewis structure is a diagram that shows the bonding between atoms of a molecule and the lone pairs of electrons that may exist in the molecule.

Front

What is the octet rule?

Back

The octet rule states that atoms tend to form compounds in ways that give them eight valence electrons, achieving a stable electron configuration.

Front

What is the chemical formula for cesium chloride?

Back

The chemical formula for cesium chloride is CsCl.

Front

How many valence electrons do most elements need according to the octet rule?

Back

Most elements need 8 valence electrons according to the octet rule.

Front

What is the chemical formula for dinitrogen tetroxide?

Back

The chemical formula for dinitrogen tetroxide is N₂O₄.

Front

What is the correct Lewis dot structure for the molecule fluorine (F₂)?

Back

The correct Lewis dot structure for fluorine (F₂) shows two fluorine atoms sharing a pair of electrons.

Front

What is the significance of lone pairs in Lewis structures?

Back

Lone pairs represent non-bonding electrons that can affect the shape and reactivity of the molecule.

Front

What is the difference between ionic and covalent bonds?

Back

Ionic bonds involve the transfer of electrons from one atom to another, while covalent bonds involve the sharing of electrons between atoms.

Front

What is a molecular formula?

Back

A molecular formula shows the number and type of atoms in a molecule, but not the arrangement of atoms.

Front

What is the role of valence electrons in chemical bonding?

Back

Valence electrons are the outermost electrons of an atom and are involved in forming bonds with other atoms.