Ionic bonding

Front

What is ionic bonding?

Back

Ionic bonding is the electrostatic attraction between oppositely charged ions, typically formed when electrons are transferred from one atom to another.

Front

How do you determine the number of valence electrons in an element?

Back

The number of valence electrons can be determined by the group number of the element in the periodic table. For example, elements in Group 1 have 1 valence electron, while those in Group 2 have 2.

Front

What is the charge of a calcium ion (Ca²⁺)?

Back

The charge of a calcium ion is +2, as it loses two electrons to achieve a stable electron configuration.

Front

What is the charge of a bromide ion (Br⁻)?

Back

The charge of a bromide ion is -1, as it gains one electron to achieve a stable electron configuration.

Front

What is the formula for magnesium bromide?

Back

The formula for magnesium bromide is MgBr₂, indicating that one magnesium ion pairs with two bromide ions.

Front

How many total electrons are in a neutral calcium atom?

Back

A neutral calcium atom has 20 electrons, which is equal to its atomic number.

Front

What happens to the electrons during the formation of an ionic bond?

Back

During the formation of an ionic bond, one atom donates electrons to another atom, resulting in the formation of positively and negatively charged ions.

Front

What is the significance of the subscript in a chemical formula, such as MgBr₂?

Back

The subscript indicates the number of ions of that element in the compound; in MgBr₂, there are two bromide ions for every magnesium ion.

Front

What is the electron configuration of a neon atom?

Back

The electron configuration of a neon atom is 1s² 2s² 2p⁶, indicating it has a full outer shell and is chemically inert.

Front

What is an oxide ion and how is it formed?

Back

An oxide ion (O²⁻) is formed when an oxygen atom gains two electrons, resulting in a -2 charge.