Atomic Number
Atomic Symbol
Family
Who Discovered It
Cound name
100
18
What is Argon
100
Boron
What is B
100
Rn
What is Nobal Gases
100
Dot diagram
Who is Niels Bohr
100
H20
What is whater
200
Silicon
What is 14
200
N
What is Nitrogen
200
Ag
What is Transition Metal
200
Atomic theory
Who is John Dalton
200
NaCl
What is Sodium Chloride
300
29
What is Copper
300
Sulfur
What is S
300
Ca
What is Alkaline earth metal
300
Electrons
Who is Josheph Thomson
300
Co
What is Carbon monoxide
400
Manganese
What is 25
400
Phosphorus
What is P
400
Hg
What is other metals
400
Named the Atom
Who is Democritus
400
Carbondioxide
What is Co2
500
88
What is Radium
500
Ho
What is Holmlurn
500
Ho
What is lanthanide series
500
Alpha particles
Who is Ernest Marsden
500
Hydrogen Peroxide
What is H2O2
M
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u