ionic bonding Flashcards
(12 cards)
why do atoms form ions?
to have a stable electronic arrangement/ configuration
when does an atom become a negative ion?
gain electron
when does an atom become a positive ion?
when it loses electrons
when does ionic bonding take place?
ionic bonding takes place when metals combine with non- metals
name 3 properties of ionic substances:
1- conduct electricity when molten or in solutions
2- hard solids with high melting and boiling point
3- form crystalline structures
name the structure of ionic substances:
1- have giant lattice structure/ionic lattice
2- have a regular repeating pattern made of oppositely charged ions
3- are held together by strong electrostatic forces of attraction also known as (ionic bonds)
these forces act in all directions in the ionic lattice
why do ionic substances have high melting and boiling points?
- because ionic substances/ compounds have strong electrostatic forces of attraction between the oppositely charged ions. these atoms require a lot of energy to overcome.
ionic substances cannot conduct electricity as solids.
- this is because the ions are in fixed position and there’s no free ion that can carry the charge.
- ionic substances can only conduct electricity when molten or in solutions
ionic substances can conduct electricity when molten or in solution
this is because the ions are free to move and easily carry the charge
ionic substances form crystalline structures
because the ions are tightly packed together in a repeating structure called a ionic lattice
how can ionic bonds in giant lattice structure be broken?
- with polar water
what is a polar molecule?
molecule that has a slight positive charge on one side and a negative charge on the other side
negative side of water- attracts positive ions- electrostatic attraction
positive side of water-attracts negative ions- electrostatic attraction
