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PERIODIC TABLE
11-20
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Cards (10)
11 -
sodium
Na
12 -
magnesium
Mg
13 -
aluminum
Al
14 -
silicon
Si
15 -
phosphorus
P
16 -
sulfur
S
17 -
chlorine
Cl
18 -
argon
Ar
19 -
potassium
K
20 -
calcium
Ca