Elements and Compounds Flashcards
1
Q
all lithium (Li) atoms have how many protons and neutrons in their nuclei.
A
3 atoms and 4 neutrons
2
Q
what is the chemical formula for; iron + sulphur -> iron sulphide
A
Fe + S -> FeS
3
Q
what is thermolysis?
A
the breakdown of molecules by the action of heat
4
Q
what do we use to separate a compound during thermolysis?
A
heat energy
5
Q
what is the heat energy converted to during thermolysis?
A
chemical energy
6
Q
what is electrolysis?
A
chemical decomposition produced by passing an electric current through a liquid
7
Q
what is ( KMn04 )?
A
potassium permanganate
8
Q
what is the positive electrode called?
A
the anode
9
Q
what is the negative electrode called?
A
the cathode
