1st Half Term Flashcards
A substance made up of one type of atom.
An element
Made up of more than one element chemically bonded/joined
A compound
More than one atom chemically joined together.
A molecule
An element
A substance made up of one type of atom
A compound
Made up of more than one element chemically joined/bonded
A molecule
More than one atom chemically joined together
What are the four main gases in the air?
Nitrogen
Oxygen
Carbon dioxide
Argon
What are the four main gases found in air (chemical formula)?
N2
O2
CO2
Ar
What is Nitrogen’s percentage in air?
78%
What is oxygen’s percentage in air?
21%
What is carbon dioxide’s percentage in air?
0.9%
What is argon’s percentage in air?
0.04%
Is nitrogen a molecule or an atom?
Molecule
Is oxygen an atom or molecule?
Molecule
Is carbon dioxide an atom or molecule?
Molecule
Is argon an atom or a molecule?
Atom
Is O2 an element or compound?
Element
Is K an element or compound?
Element
Is CO2 an element or a compound?
Compound
Is Cu an element or a compound?
Element
What is the name of NaO2?
Sodium oxide
What is the name of CaCl2?
Calcium chloride
What is the name of CuSO2?
Copper sulfate
What is a chemical reaction in word equation form?
a+b(arrow)ab
E.g. copper+oxygen(arrow) copper oxide
What is the difference between a compound and a mixture?
Compounds are substances which are only made from chemicals bonded elements whereas mixtures are substances formed from physically mixing two or more substances.
How many oxygen atoms are there in CuO2?
2
How many chlorine atoms are there in Cu(O2Cl3)3?
9