chem paper 1

Created by

rosie ryan

Cards (200)

What is an element?
A single type of atom found on the periodic table
What is a compound?
2 or more elements that are chemically bonded together
charge on a proton 
+1
mass of a proton
1
mass of a neutron
1
charge on a neutron
0
charge on a electron
-1
mass of an electron
1/1840
what is the larger number on the periodic table
mass number
what is the smaller number on the periodic table
atomic number
what does the atomic number tell us
number of protons
what does the mass number tell us
number of protons + neutrons
formula for sulfuric acid
H2SO4
what is a mixture
2 or more elements not chemically combined
how can you separate mixtures
distillation
evaporation
filtration
fractional distillation
what is a solute 
a solid which dissolves in a solvent
what is a solvent
a liquid in which a solute dissolves
what is a solution 
mixture of a solvent and solute
what is distillation 
when you separate things that have different boiling points
what is evaporation 
when you remove the liquid and leave solids that have been dissolved in the liquid in the dish
what is filration 
where we have large particles of solid in a liquid. The solids will stick to the filter paper and the liquid will drip through
what is fractional distillation 
when you take lots of different liquids off at different boiling points
what is the plum pudding model
the first model where a there was a cloud of positive charge and some negative electrons dotted throughout
What test did Rutherford and Marsden do?
The gold foil test
What was the gold foil test
they took an alpha particle gun and fired the alpha particles at a very thin sheet of gold foil.
What happened to most of the fired particles in the gold foil test?
They went through the gold sheet. Some particles deflected a little bit, and some deflected quite a large bit
How did the gold foil lead to Bohr's Nuclear model? 
He suggested that all particles had a positive centre, and around the positive centre was all negative
What was Rutherford discover? 
The Nucleus and Protons
What did Chadwick discovered? 
Neutrons
Who discovered our current particle model? 
Bohr
What does the group number tell us about a particles outside electron
The group number is how many electrons are in the outer shell
What does the period (row) tell us about how many shells a particle has?
The period (row) it is in, tells us how many shells the particle has
What happens to Non-Metals' electrons when forming an ion
They always gain electrons, which gives it a negative charge
What happens to Metals' electrons when forming an ion
They always lose an electron, which gives it a positive charge
How did Newland group the early periodic table
He grouped them in octaves (groups of 8), by mass, but did not leave any gaps
How did Mendeleev group the periodic table? 
He grouped them by mass, and in groups with similar patterns. He also left groups for new elements which he predicted would be added.
What are group 8/group 0 elements called?
Noble Gases
What do Noble Gases' have in their outer shell
They have a full outer shell
As Noble Gases already have a full outer shell, what does this mean they are? 
very unreactive
What are group 7 elements called?
The Halogens