Elements
Protons
Creators
Acid or Base
Groups or Periods
100
What is O?
Oxygen
100
How many protons are there in Nitrogen?
7
100
Who created Ar?
Sir William Ramsey
100
What level is water?
7
100
What group is iron in?
8
200
What is Ar?
Argon
200
How many protons are there in Kr?
36
200
Who created Iron?
Henry E. Seeley
200
What level is milk?
6
200
What period is krypton in?
4
300
What is Rn?
Radon
300
How many protons are there in Xe?
54
300
Who created Iodine?
Barnard courtois
300
What level is a tomato?
4
300
What group is Radon in?
18
400
What is Tl?
Thallium 
400
How many protons are there in Pb?
82
400
What was the name of one of the two inventors of Alkali Metals?
Robert bunsen
400
What level is ammonia?
11
400
What group in mercury in?
12
500
What is the element letters for Tungsten?
W
500
How many protons are there in Fermuim?
100
500
What was the name of the inventor of Np?
Edwin Mcmillan
500
What level is stomach acid?
1
500
What period and group is Antimony in?
5 and 15
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