Chemical Bonding and Structure - IBDP1

Ions are formed when _______________ electrons are transferred from one atom to another.

Elements of what group do not form ions.

• Alkali metals (Group 1)

• Alkaline earth metals (Group 2)

• Halogens (Group 17)

• Noble Gases (Group 18)

Tick the correct elements and their charges on ion formation.

• Sodium 2+

• Aluminium 3+

• Oxygen 2+

• Bromine 1-

• Phosphorus 3-

Deduce the charges of the following elements:

Potassium, Xenon, Fluorine. (Answers in A, B, C)

_______________ Elements can form different types of ions.

Polyatomic ions are -

• Ions made up of multiple of the same element

• Ions of commonly occurring compounds

• Ions with multiple charges

• Elements with multiple ions

Tick the correct ones

• PO4 ^3-

• NH4 ²⁺

• CO3 ^2-

• NO3 ^-

• OH ⁺

Ionization occurs when valence electrons are transferred between atoms until they reach the electron configuration of a noble gas. Writing the formula for the ionic compound therefore involves balancing the total number of positive and negative charges, taking into account the different charges on each ion. Using this knowledge, find out the product of Mg and F.

• MgF

• Mg₂F

• MgF₂

• Mg₂F₂

What is the coordination number of the ionic lattice of NaCL?

• 2

• 4

• 6

• 8

Ionic compounds tend to have ______ melting and boiling points as the forces of electrostatic attraction between the ions in the lattice are _______ and so require _______ amounts of heat energy to break.

• Low, Weak, Less

• Low, Strong, Less

• High, Weak, Less

• High, Strong, Large