Ionic and Metallic Bonding

Front

What is ionic bonding?

Back

Ionic bonding is the electrostatic attraction between positively charged ions (cations) and negatively charged ions (anions) formed when electrons are transferred from one atom to another.

Front

What is metallic bonding?

Back

Metallic bonding is the force of attraction between free-floating valence electrons and the positively charged metal ions, allowing metals to conduct electricity and heat.

Front

Which compound has a higher melting point: MgO or NaCl?

Back

MgO has a higher melting point due to stronger ionic bonds compared to NaCl.

Front

Why does magnesium have a higher melting point than sodium?

Back

Magnesium has a higher melting point because it contributes two additional electrons per atom to the electron sea compared to sodium's one.

Front

What determines the strength of an ionic bond?

Back

The strength of an ionic bond is determined by the charges of the ions and the distance between them; higher charges and shorter distances result in stronger bonds.

Front

What is the significance of the ionic charge in BeO compared to NaCl?

Back

BeO has a larger ionic charge than NaCl, which contributes to its stronger ionic bond.

Front

What is the most suitable metal for making a crucible to melt sodium?

Back

Calcium (Ca) is suitable because it has a higher melting point than sodium.

Front

What ion is formed by an atom with three electrons in its outermost shell?

Back

An atom with three electrons in its outermost shell will most likely form a X³⁺ ion.

Front

How does the distance between ions affect ionic bond strength?

Back

A smaller distance between ions increases the strength of the ionic bond due to stronger electrostatic attraction.

Front

What is the electron sea model?

Back

The electron sea model describes metallic bonding as a sea of delocalized electrons that are free to move around, contributing to conductivity.