Ionic & Covalent Bonds Checkpoint

Front

What is an ionic bond?

Back

An ionic bond is a type of chemical bond formed through the electrostatic attraction between oppositely charged ions, typically formed when one atom donates an electron to another.

Front

What is a covalent bond?

Back

A covalent bond is a type of chemical bond formed when two atoms share one or more pairs of valence electrons.

Front

What is the formula for an ionic compound?

Back

Ionic compounds are typically represented by a formula that shows the ratio of the ions, such as NaCl (sodium chloride) or BaCl2 (barium chloride).

Front

What is the formula for a covalent compound?

Back

Covalent compounds are represented by molecular formulas that indicate the number of each type of atom, such as H2O (water) or CO2 (carbon dioxide).

Front

How many valence electrons does hydrogen need to be stable?

Back

Hydrogen needs 2 electrons in its valence shell to be stable.

Front

What happens when an atom loses an electron?

Back

When an atom loses an electron, it becomes a positive ion (cation).

Front

What type of bond is formed between calcium and oxygen?

Back

An ionic bond is formed when calcium atoms react with oxygen atoms.

Front

What is the difference between polar and nonpolar covalent bonds?

Back

Polar covalent bonds occur when electrons are shared unequally between atoms, resulting in partial charges, while nonpolar covalent bonds occur when electrons are shared equally.

Front

What is a positive ion?

Back

A positive ion, or cation, is an atom that has lost one or more electrons, resulting in a net positive charge.

Front

What is a negative ion?

Back

A negative ion, or anion, is an atom that has gained one or more electrons, resulting in a net negative charge.