Chemistry- ionic, metallic,covalent bonding Flashcards
what is an ion
e negatively or positevely charged atom
Why do atoms form ions?
to achieve a stable electronic configuration
what do non metals form?
negative ions
metals form
positive ions
Definition of Ionic Bonding
occurs in compounds of metals combined with non metals
how can we show the loss or gaining of electrons?
We can show how the electrons of a metal go to a non metal by using a cross and dot diagram
what do metals form
positive ions
in metllic bonding are there delocalised electrons
yes and are able to flow around
definiton of metallic bonding:
its the force of attraction between the positive metal ions and the sea of electrons that form a giant mwtallic structure
when does covalent bonding occur?
occurs between two or more non metal atoms that share pairs of electrons in order to achive a stable electronic configuration
in ionic substances can they conduct electricity ?
yes molten or in a solution
describe the boiling and melting point of ionic substances
high melting and boiling point
what do ionic substances form?
crysalline structures
what structure do ionic subtances have
giant ionic lattice
describe pattern of ionic subtances
regular repeating pattern of oppositely charged ions
what are ionic subsanced held by
strong electrostatic forces of attractions
can ionis substances conduct eelctricity as solids
ni because he ions are in a fixed position
why do ionic substances form a hard crystalline sreuctire
because the ions are tightly packed together in a regular repeartong pattern called ionic lattice
What is an Ion?
A charged atom/group of charged atoms
Why do atoms form ions?
To have a stable electronic arrangement
When does an atom become a negative ion?
when it gains electrons, an atom becomes a negative ion
When does an atom become a positive ion?
when it looses electrons, at atom becomes a positive ion
What do NON- Metals form?
Negative ions
What do Metals form?
Positive ions
When does Ionic Bonding occur?
Ionic bonding occurs in compounds from metals combining with non metals.