Small stuff
Which subatomic particle has no charge?
Neutron
What is an ion?
An atom with a charge
What is the formula for density?
Density = mass/volume
What force holds ionic compounds together?
Electrostatic attraction
What is the name of Group 1 metals?
Alkali metals
Where are electrons found in atoms?
In the shells
What type of ions do metals form?
Cations/Positive ions
What is the unit for volume of a solid?
cm3/m3
What force holds the metallic structure together in metallic bonding?
Electrostatic attraction
Increases
More shells, easier to lose electrons
What is the electronic configuration of Magnesium?
2,8,2
What is the charge on an oxide ion?
-2
What measurement tool can we use to find the volume of an irregular solid?
Measuring cylinder
Why is graphite soft but diamond is hard?
Graphite have layers 2 weak forces between them
In diamond, all carbons are fully bonded (4 C bonded to 1 C)
What would I observe if I added calcium metal to hydrochloric acid? Why?
Bubbles because hydrogen gas is formed.
What does the term atomic mass mean?
The total number of protons and neutrons in an atom
What happens to sulfur in an ionic bond?
It gains 2 electrons for a full outer shell
A cube has sides of 2cm and a mass of 16g. What is its density?
volume = 2x2x2 = 8 cm3
Density = 16/8 = 2g/cm3
Do solid ionic compounds conduct electricity? Why or why not?
No, no free ions/no flow of charge
Why must metals like Potassium be stored in oil?
It is very reactive and will react with oxygen and water vapour in air.
How many neutrons are found in chlorine if its mass is 37? Use the periodic table to help you
20 neutrons
Why do ionic compounds have higher melting points compared to simple covalent molecules?
Ionic compound- Giant ionic structure, strong electrostatic attraction, lots of energy required
Covalent- weak intermolecular forces between molecules, less energy required
Particles are packed closer together
Why are metals malleable?
The metal ions are arranged in layers that can slide over each other (when force is applied)
What colour would universal indicator turn if I added sodium to water followed by a universal indicator?
Purple/Blue (alkaline)