GCSE Pearson Edexcel Separate Science Chemistry: Atoms
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20 Terms
Compound
A substance made up of atoms of two or more different elements joined by chemical bonds. For example, water.
Element
A pure substance made of only one kind of atom For example, a diamond is made of pure carbon!
Plum Pudding Model (Thomson)
JJ Thomson's atomic model which depicts a positively charged space containing negatively charged electrons
Electrons
Negatively charged particles
Proton
A particle that has a positive charge and is found in the nucleus of an atom
Sodium
Atomic Number: 11
Symbol: Na
Aluminium
Atomic Number: 13
Symbol: Al
How many neutrons does an aluminium atom have?
14
How many electrons does an aluminium atom have?
13
What is the mass number of lithium?
7
How many electrons does a lithium atom contain?
3
How many protons are there in an atom of potassium?
19
How many neutrons are there in an atom of potassium?
20
Can you draw a sodium atom?
Sodium
How many electrons does a sodium atom have?
11
What is the electron structure of a sodium atom?
2.8.1
How many electrons are there in an aluminium atom?
13
What is the electron structure of aluminium?
2.8.3
What group can aluminium be found in?
Aluminium is a group 3 element
What is the atomic number of aluminium?
13
Note 
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