AQA Unit 1 Chemistry Flashcards
What is an element?
A substance made of one type of atom
What is a compound?
A substance made of two or more types of atom chemically bonded together
What is a mixture?
Two or more elements and compounds not chemically bonded together
Is oxygen an element, compound or mixture?
An element
Is carbon dioxide an element, compound or a mixture?
A compound
Is air an element, compound or a mixture
A mixture
How many carbon atoms are in CO2?
one carbon atom
How many chlorine atoms are in Al3Cl6
six chlorine atoms
How many different elements are in C6H12O6?
three different elements (carbon, hydrogen, oxygen)
What is the centre of an atom called?
The nucleus
What are three subatomic particles in an atom
Protons, electrons and neutrons
Where are protons and neutrons located in the atom?
In the nucleus
Where are electrons located in the atom?
In the shells (energy levels)
What is the charge of a neutron?
Zero
What is the mass of a proton, electron and neutron? (HINT - PEN 101)
1,0,1
How many electrons can you fit in the first three shells?
2,8,8
Who came up with the plum pudding model?
JJ Thomson
Who said that the atom had a dense nucleus with electrons in orbit?
Ernest Rutherford
Who said that the electrons were in shells?
Niels Bohr
Who discovered the neutron?
James Chadwick
What are the elements in group 1 called?
Alkali metals
What are the elements in group 7 called?
Halogens
What are the elements in group 0 called?
Noble gases
Why are the noble gases (group 0) unreactive?
They all have a full outer shell
