What is the charge and mass of an electron
charge=+1 mass=1
charge=-1 mass=1
charge=-1 mass=1/2000
Which ones are the correct state symbols?
Solid - s
Liquid - lq
Gas - g
Aqueous - a
What do ionic bonds form?
Ion
Element
Compound
What happens to electrons in ionic bonding?
a metal loses electron(s) and a non-metal gains electron(s).
a metal gains electron(s) and a non-metal loses electron(s).
In ionic bonding, which charged particles attract?
positive with positive
negative with negative
positive with negative
What are the correct properties of giant ionic compounds?
it conducts as a liquid and as a solid as the electrons are free to move
they are very brittle and break when hit
they have extremely low melting points due to lots of bonds
they are soluble in water
NH3 is ammonia
compounds such as carbon dioxide (CO2), chlorine (Cl2) and water (H2O) are called simpelr molecular compounds.
what are the correct properties of a simple covalent compounds
low melting point
strong covalent bonds between atoms
strong intermolecular forces
doesn't take a lot of energy to break the bonds
not usually a gas
no electrical conductivity
doesn't conduct as a solid or liquid but does conduct as a gas
there are no charged particles
Diamond is made up of carbon atoms. Each carbon atom has four strong bonds and is very hard.
diamond is a simple covalent structure
Does diamond have a low or high melting point?
Low melting point
High melting point
diamond can conduct electricity
Tick the correct statements in reference to Graphite
made up of carbon atoms
has 5 strong bonds
atoms form layers
contains delocalised electrons
the delocalised electrons are not free to move
cannot conduct electricity
layers can slide over each other
graphite is soft
metals are soft and malleable
metals are weak
they are good conductors of electricity
they are poor conductors of heat
what is an alloy?
a pure metal
a mixture of metals
a mixture of metals and non-metals
a metallic bond is the bonding of the free electrons in metals.
the attraction is between neutral metal ions and delocalised electrons
