Chemistry B Flashcards
(20 cards)
Ionic bonding happens between:
a metal and a non-metal
Ionic bonding forms when:
the metal transfers electrons to the non-metal forming ions
Ion
a charged particle from an atom gaining or losing electrons
(in ionic bonding) metals form …
postive ions
(in ionic bonding) non-metals form…
negative ions
A giant ionic lattice is formed when:
The lattice is formed because the ions attract each other and form a regular pattern with oppositely charged ions next to each other
what is the melting point for ionic bonding/ compounds?
it has a high melting point as a lot of energy is needed to break the ionic bonds and electrostatic bonds.
Can ionic compounds conduct electricity?
They can only conduct electricity when molten or in a solution. This is because ions can move and carry electrical current.
Covalent bonding happens between
two non-metals
how does covalent bonding form?
The two non-metals share a pair of electrons.
molecule?
two or more atoms bonded together
what is the melting/boiling point in covalent compounds?
low melting and boiling points due to the weak intermolecular forces.
Can covalent compounds conduct electricity?
they don’t conduct electricity as there aren’t any free electrons that can move.
what is the structure of a metallic compound?
layers of positive metal ions in a sea of delocalized electrons.
malleable
the ability to bend
why are metals malleable?
the layers of ions can slide over each other.
what is the melting point of metallic compounds?
there is a high melting point as lots of energy is needed to break the metallic bonds and electrostatic bonds between the positive ions and negative electrons
can metallic compounds conduct electricity?
they can conduct electricity as the sea of delocalized electrons can carry the electrical current through the metal
alloy
a mixture of two different metals
why are alloys harder than pure metals?
they have different sized atoms so the layers cannot slide over each other.
