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A screenshot of a browser game with a text box for entry, and a red rule box explaining a rule in The Password Game.
Screenshot by Dot Esports

How to beat Rule 18 of the Password Game – Atomic numbers that add to 200

Back to high school chemistry we go.

The Password Game by Neal.Fun requires concentration—especially when it comes to Rule 18. Solving Rule 18 requires strategically finding atomic numbers that add up to 200. So, we’re here to tell you what an atomic number is and how to add them to get a specific number.

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Here’s how to beat Rule 18 of The Password Game and more about atomic numbers.

How to beat Rule 18 of The Password Game

A screenshot of The Password Game, listing a particular rule in red while a password sits incomplete in a text entry box.
Whether you meant to or not, you might have a few elements already loaded. Screenshot by Dot Esports

To satisfy Rule 18 for The Password Game, you have to choose elements from the periodic table and have their atomic numbers add together to equal 200.

Each element on the periodic table has an atomic number, and you likely already have a few in your password—some intentionally, some by accident.

Tip:

Figure out what numbers you need to keep to achieve 200. Use a spreadsheet or take notes to help you keep track.

In my puzzle above, the elements V, Zn, and N were highlighted—but the only atomic element I entered was Zn to satisfy Rule 12. You may find this also happens to you, whether it be due to needing a Roman numeral or because of a random element appearing in your captcha.

Fortunately, depending on how many atomic elements you’ve included, you may be one character away from resolving Rule 18. Here are some steps to follow once you have simplified your password:

  1. Figure out and note down the numbers that should stay. These are your constant values that equal the total Atomic number. Check the table below for more Atomic values.
  2. Add those constant values together to determine your Atomic total.
  3. Subtract that Atomic total from 200.
  4. Then add in the Atomic number(s) to get from the sum of the Atomic total to 200.
  5. This will then satisfy the rule.

Below, we’ve included a table listing each element’s atomic number. If you find you are over the limit, keep in mind that most of the rules aren’t case-sensitive, whereas atomic elements are. Simply dropping an element to lowercase will remove it from the overall count to 200, which may free you up to add another symbol.

Tip:

Future rules may see you inadvertently add another atomic element, so return to this list to check for any changes you need to make.

Atomic number list for The Password Game:

SymbolAtomic number
HOne
HeTwo
LiThree
BeFour
BFive
CSix
NSeven
OEight
FNine
Ne10
Na11
Mg12
Al13
Si14
P15
S16
Cl17
Ar18
K19
Ca20
Sc21
Ti22
V23
Cr24
Mn25
Fe26
Co27
Ni28
Cu29
Zn30
Ga31
Ge32
As33
Se34
Br35
Kr36
Rb37
Sr38
Y39
Zr40
Nb41
Mo42
Tc43
Ru44
Rh45
Pd46
Ag47
Cd48
In49
Sn50
Sb51
Te52
I53
Xe54
Cs55
Ba56
La57
Ce58
Pr59
Nd60
Pm61
Sm62
Eu63
Gd64
Tb65
Dy66
Ho67
Er68
Tm69
Yb70
Lu71
Hf72
Ta73
W74
Re75
Os76
Ir77
Pt78
Au79
Hg80
Tl81
Pb82
Bi83
Po84
At85
Rn86
Fr87
Ra88
Ac89
Th90
Pa91
U92
Np93
Pu94
Am95
Cm96
Bk97
Cf98
Es99
Fm100
Md101
No102
Lr103
Rf104
Db105
Sg106
Bh107
Hs108
Mt109
Sd110
Rg111
Uub112
Uuq114
Tip:

The Password Game is definitely challenging. If you’re struggling with Rule 18 or any other rule, you can always try starting the game over from the beginning. While that means you have to redo a lot of your work, a new start could give you a much-needed breath of fresh air. Plus, knowing what rules lie in wait could also help you with the earlier rules.


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Image of Nicholas Taifalos
Nicholas Taifalos
Weekend editor for Dot Esports. Nick, better known as Taffy, began his esports career in commentary, switching to journalism with a focus on Oceanic esports, particularly Counter-Strike and Dota. Email: nicholas@dotesports.com
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