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 and element, compound or mixture ?
It’s an element !
Is carbon dioxide an element, compound or a mixture ?
It’s a compound !
Is air and element, compound or a mixture
It’s a mixture !
How many carbon atoms are in CO2
There is one atom !
How many chlorine atoms are in AL3CL6
There is 6 atoms !
How many different elements are in C6H12O6
There is 3 elements ! (Carbon, hydrogen and oxygen)
What is the centre of an atom called ?
It is the nucleus
What ae the three subatomic particles in an atom?
Proton, neutron and electrons
Where are protons and neutrons located in the atom ?
In the nucleus
Where are electrons located ?
In the shells.
What is the charge of a neutron ?
Zero
What is the mass of a proton, electron and neutron
HINT- Pen101
1,0,1
How many electrons can you put in the first three shells ?
2,8,8
Who came up with the plumb pudding model ?
JJ Thompson
Who said that the atom had a dense nucleus with electrons in orbit ?
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 in the periodic table
Alkali metals
What are the elements on 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
What happens to the reactivity down group 1 ?
They get more reactive down the group
