How many different elements are there?
Around 1000
Around 200
Around 100
Number of protons =
number of neutrons
mass number
number of electrons
Choose the BALANCED equation
Mg + O2 -> MgO
2Mg + O2 -> 2Mg0
Mg + O2 -> 2MgO
How would Zinc (Zn) be extracted from its ore?
It's found as Zinc naturally
Electrolysis
Reduction with carbon
Methods of extracting copper like Bioleaching and Phytomining are good because....
High grade copper ores don't exist
High grade copper ores are running out
Demand for copper is decreasing so other methods are too large scale
Which of these is an alloy?
Silver
Bronze
Gold
On the second electron shell (when showing an element's electronic structure) there can be up to....
2 electrons
4 electrons
8 electrons
If neon has 10 protons, which diagram correctly shows its electronic structure?
Which of these is the most reactive?
Copper
Potassium
Hydrogen